steve/inch-nut

Hex, jam and square nuts, inch, ASME B18.2.2: machine screw nuts #0 to #10, hex, jam and square nuts 1/4 to 1/2 in.

v1.0.0 Latest STEVE MIT 0

Open in STEVE

Isometric

Parameters

Preset38 sizes

Thread27 options

Style

hexjamsquare

hex, jam (1/4 in and up) or square.

Material3 options

steel: carbon steel, zinc plated; stainless-18-8 (304) or stainless-316.

Defaults built

part.py 78 lines · Python · STEVE runtime · checked

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"""Nut, inch series, Unified threads #0-80 to 1/2-20, ASME B18.2.2: hex and square nuts (machine screw nuts for #0 to

#10, hex and square nuts for 1/4 to 1/2 in) and hex jam nuts (1/4 to 1/2 in).

Envelope model for assemblies: a hexagonal or square prism (width across flats F, thickness H; corner chamfers not

modelled) with a plain bore at the basic major diameter D of ASME B1.1 (the thread is not modelled). It sits on the

XY plane, centred on the origin, axis along +Z. The model is in millimetres (1 in = 25.4 mm).

"""

from steve import Model

size = "1/4-20" # Thread (Unified, ASME B1.1)

style = "hex" # Nut style

material = "steel" # Material

# Thread designation: nominal size

THREADS = {

"#0-80": "#0", "#1-64": "#1", "#1-72": "#1", "#2-56": "#2", "#2-64": "#2", "#3-48": "#3", "#3-56": "#3",

"#4-40": "#4", "#4-48": "#4", "#5-40": "#5", "#5-44": "#5", "#6-32": "#6", "#6-40": "#6", "#8-32": "#8",

"#8-36": "#8", "#10-24": "#10", "#10-32": "#10", "1/4-20": "1/4", "1/4-28": "1/4", "5/16-18": "5/16",

"5/16-24": "5/16", "3/8-16": "3/8", "3/8-24": "3/8", "7/16-14": "7/16", "7/16-20": "7/16", "1/2-13": "1/2",

"1/2-20": "1/2",

}

# Inches. ASME B1.1-1989 (R2001) basic major diameter D, https://www.engineersedge.com/screw_threads_chart.htm

DIAMETERS = {

"#0": 0.0600, "#1": 0.0730, "#2": 0.0860, "#3": 0.0990, "#4": 0.1120, "#5": 0.1250, "#6": 0.1380,

"#8": 0.1640, "#10": 0.1900, "1/4": 0.2500, "5/16": 0.3125, "3/8": 0.3750, "7/16": 0.4375, "1/2": 0.5000,

}

# Inches, style: {nominal: (width across flats F, thickness H)}.

# #0 to #10: ASME B18.2.2 square and hex machine screw nuts (Table 1-1 of the 2010 edition, Table 1.1.1-1 of 2022):

# F basic and H max (the table gives thickness as min / max only), https://www.fasten.it/Norms/Norm/ASME_B18.2.2_TABLE_1-1

# (2010), also https://www.engineersedge.com/hardware/hexagon_machine_screw_nuts_14062.htm (F basic as fractions).

# 1/4 to 1/2: ASME B18.2.2 hex nuts, hex jam nuts and square nuts, F basic and H basic,

# https://www.engineersedge.com/hex_nut.htm, https://amesweb.info/Fasteners/Nut/Hex-Nut-Sizes-Dimensions-Table.aspx,

# https://www.aftfasteners.com/hex-jam-nuts-dimensions-technical-information/,

# https://amesweb.info/Fasteners/Nut/Square-Nuts-Dimensions.aspx (B18.2.2-2010 via Machinery's Handbook 30th ed.).

NUTS = {

"hex": {

"#0": (0.15625, 0.050), "#1": (0.15625, 0.050), "#2": (0.1875, 0.066), "#3": (0.1875, 0.066),

"#4": (0.25, 0.098), "#5": (0.3125, 0.114), "#6": (0.3125, 0.114), "#8": (0.34375, 0.130),

"#10": (0.375, 0.130), "1/4": (0.4375, 0.21875), "5/16": (0.5, 0.265625), "3/8": (0.5625, 0.328125),

"7/16": (0.6875, 0.375), "1/2": (0.75, 0.4375),

"jam": {

"1/4": (0.4375, 0.15625), "5/16": (0.5, 0.1875), "3/8": (0.5625, 0.21875), "7/16": (0.6875, 0.25),

"1/2": (0.75, 0.3125),

"square": {

"#0": (0.15625, 0.050), "#1": (0.15625, 0.050), "#2": (0.1875, 0.066), "#3": (0.1875, 0.066),

"#4": (0.25, 0.098), "#5": (0.3125, 0.114), "#6": (0.3125, 0.114), "#8": (0.34375, 0.130),

"#10": (0.375, 0.130), "1/4": (0.4375, 0.21875), "5/16": (0.5625, 0.265625), "3/8": (0.625, 0.328125),

"7/16": (0.75, 0.375), "1/2": (0.8125, 0.4375),

}

# material choice: (STEVE material library id, appearance colour)

MATERIALS = {

"steel": ("steel-generic", "#b8bcc2"), # carbon steel, zinc plated

"stainless-18-8": ("stainless-304", "#c9ccd0"),

"stainless-316": ("stainless-316", "#c9ccd0"),

}

# style: (polygon sides, rotation in degrees): hexagon corners on X, square sides parallel to X and Y

SHAPES = {"hex": (6, 0), "jam": (6, 0), "square": (4, 45)}

INCH = 25.4

nominal = THREADS[size]

F, H = NUTS[style][nominal]

d = DIAMETERS[nominal] * INCH

s = F * INCH

m = H * INCH

sides, turn = SHAPES[style]

material_id, colour = MATERIALS[material]

model = Model()

with model.sketch("nut_sketch", on="XY", name="Nut") as sk:

sk.polygon("outline", (0, 0), s / 2, sides, inscribed=False, rotation=turn)

sk.circle("bore", (0, 0), d / 2)

model.extrude("nut", "nut_sketch", distance=m, name="Nut")

model.material(material_id, color=colour)

result = model.result()

"""Nut, inch series, Unified threads #0-80 to 1/2-20, ASME B18.2.2: hex and square nuts (machine screw nuts for #0 to
#10, hex and square nuts for 1/4 to 1/2 in) and hex jam nuts (1/4 to 1/2 in).

Envelope model for assemblies: a hexagonal or square prism (width across flats F, thickness H; corner chamfers not
modelled) with a plain bore at the basic major diameter D of ASME B1.1 (the thread is not modelled). It sits on the
XY plane, centred on the origin, axis along +Z. The model is in millimetres (1 in = 25.4 mm).
"""
from steve import Model

size = "1/4-20"  # Thread (Unified, ASME B1.1)
style = "hex"  # Nut style
material = "steel"  # Material

# Thread designation: nominal size
THREADS = {
    "#0-80": "#0", "#1-64": "#1", "#1-72": "#1", "#2-56": "#2", "#2-64": "#2", "#3-48": "#3", "#3-56": "#3",
    "#4-40": "#4", "#4-48": "#4", "#5-40": "#5", "#5-44": "#5", "#6-32": "#6", "#6-40": "#6", "#8-32": "#8",
    "#8-36": "#8", "#10-24": "#10", "#10-32": "#10", "1/4-20": "1/4", "1/4-28": "1/4", "5/16-18": "5/16",
    "5/16-24": "5/16", "3/8-16": "3/8", "3/8-24": "3/8", "7/16-14": "7/16", "7/16-20": "7/16", "1/2-13": "1/2",
    "1/2-20": "1/2",
}
# Inches. ASME B1.1-1989 (R2001) basic major diameter D, https://www.engineersedge.com/screw_threads_chart.htm
DIAMETERS = {
    "#0": 0.0600, "#1": 0.0730, "#2": 0.0860, "#3": 0.0990, "#4": 0.1120, "#5": 0.1250, "#6": 0.1380,
    "#8": 0.1640, "#10": 0.1900, "1/4": 0.2500, "5/16": 0.3125, "3/8": 0.3750, "7/16": 0.4375, "1/2": 0.5000,
}
# Inches, style: {nominal: (width across flats F, thickness H)}.
# #0 to #10: ASME B18.2.2 square and hex machine screw nuts (Table 1-1 of the 2010 edition, Table 1.1.1-1 of 2022):
# F basic and H max (the table gives thickness as min / max only), https://www.fasten.it/Norms/Norm/ASME_B18.2.2_TABLE_1-1
# (2010), also https://www.engineersedge.com/hardware/hexagon_machine_screw_nuts_14062.htm (F basic as fractions).
# 1/4 to 1/2: ASME B18.2.2 hex nuts, hex jam nuts and square nuts, F basic and H basic,
# https://www.engineersedge.com/hex_nut.htm, https://amesweb.info/Fasteners/Nut/Hex-Nut-Sizes-Dimensions-Table.aspx,
# https://www.aftfasteners.com/hex-jam-nuts-dimensions-technical-information/,
# https://amesweb.info/Fasteners/Nut/Square-Nuts-Dimensions.aspx (B18.2.2-2010 via Machinery's Handbook 30th ed.).
NUTS = {
    "hex": {
        "#0": (0.15625, 0.050), "#1": (0.15625, 0.050), "#2": (0.1875, 0.066), "#3": (0.1875, 0.066),
        "#4": (0.25, 0.098), "#5": (0.3125, 0.114), "#6": (0.3125, 0.114), "#8": (0.34375, 0.130),
        "#10": (0.375, 0.130), "1/4": (0.4375, 0.21875), "5/16": (0.5, 0.265625), "3/8": (0.5625, 0.328125),
        "7/16": (0.6875, 0.375), "1/2": (0.75, 0.4375),
    },
    "jam": {
        "1/4": (0.4375, 0.15625), "5/16": (0.5, 0.1875), "3/8": (0.5625, 0.21875), "7/16": (0.6875, 0.25),
        "1/2": (0.75, 0.3125),
    },
    "square": {
        "#0": (0.15625, 0.050), "#1": (0.15625, 0.050), "#2": (0.1875, 0.066), "#3": (0.1875, 0.066),
        "#4": (0.25, 0.098), "#5": (0.3125, 0.114), "#6": (0.3125, 0.114), "#8": (0.34375, 0.130),
        "#10": (0.375, 0.130), "1/4": (0.4375, 0.21875), "5/16": (0.5625, 0.265625), "3/8": (0.625, 0.328125),
        "7/16": (0.75, 0.375), "1/2": (0.8125, 0.4375),
    },
}
# material choice: (STEVE material library id, appearance colour)
MATERIALS = {
    "steel": ("steel-generic", "#b8bcc2"),        # carbon steel, zinc plated
    "stainless-18-8": ("stainless-304", "#c9ccd0"),
    "stainless-316": ("stainless-316", "#c9ccd0"),
}
# style: (polygon sides, rotation in degrees): hexagon corners on X, square sides parallel to X and Y
SHAPES = {"hex": (6, 0), "jam": (6, 0), "square": (4, 45)}
INCH = 25.4

nominal = THREADS[size]
F, H = NUTS[style][nominal]
d = DIAMETERS[nominal] * INCH
s = F * INCH
m = H * INCH
sides, turn = SHAPES[style]
material_id, colour = MATERIALS[material]

model = Model()
with model.sketch("nut_sketch", on="XY", name="Nut") as sk:
    sk.polygon("outline", (0, 0), s / 2, sides, inscribed=False, rotation=turn)
    sk.circle("bore", (0, 0), d / 2)
model.extrude("nut", "nut_sketch", distance=m, name="Nut")
model.material(material_id, color=colour)
result = model.result()

pypart.toml 33 lines · TOML

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name = "steve/inch-nut"

version = "1.0.0"

runtime = "steve"

license = "MIT"

summary = "Hex, jam and square nuts, inch, ASME B18.2.2: machine screw nuts #0 to #10, hex, jam and square nuts 1/4 to 1/2 in."

description = """Nut for Unified inch threads: hex nuts and square nuts to ASME B18.2.2 (machine screw nuts for #0 to #10, \

hex and square nuts for 1/4 to 1/2 in) and hex jam nuts (1/4 to 1/2 in only). Envelope geometry for assemblies: a hexagonal or square prism (width across flats F, thickness H; \

corner chamfers not modelled) with a plain bore at the ASME B1.1 basic major diameter; the thread itself is not \

modelled.

It sits on the XY plane, centred on the origin (the model is in millimetres). Dimensions: see the README."""

tags = ["fastener", "nut", "hex-nut", "jam-nut", "square-nut", "asme-b18-2-2", "inch"]

[parameters.size]

type = "choice"

default = "1/4-20"

choices = ["#0-80", "#1-64", "#1-72", "#2-56", "#2-64", "#3-48", "#3-56", "#4-40", "#4-48", "#5-40", "#5-44", "#6-32", "#6-40", "#8-32", "#8-36", "#10-24", "#10-32", "1/4-20", "1/4-28", "5/16-18", "5/16-24", "3/8-16", "3/8-24", "7/16-14", "7/16-20", "1/2-13", "1/2-20"]

label = "Thread"

[parameters.style]

type = "choice"

default = "hex"

choices = ["hex", "jam", "square"]

label = "Style"

description = "hex, jam (1/4 in and up) or square."

[parameters.material]

type = "choice"

default = "steel"

choices = ["steel", "stainless-18-8", "stainless-316"]

label = "Material"

description = "steel: carbon steel, zinc plated; stainless-18-8 (304) or stainless-316."

name = "steve/inch-nut"
version = "1.0.0"
runtime = "steve"
license = "MIT"
summary = "Hex, jam and square nuts, inch, ASME B18.2.2: machine screw nuts #0 to #10, hex, jam and square nuts 1/4 to 1/2 in."
description = """Nut for Unified inch threads: hex nuts and square nuts to ASME B18.2.2 (machine screw nuts for #0 to #10, \
hex and square nuts for 1/4 to 1/2 in) and hex jam nuts (1/4 to 1/2 in only). Envelope geometry for assemblies: a hexagonal or square prism (width across flats F, thickness H; \
corner chamfers not modelled) with a plain bore at the ASME B1.1 basic major diameter; the thread itself is not \
modelled.

It sits on the XY plane, centred on the origin (the model is in millimetres). Dimensions: see the README."""
tags = ["fastener", "nut", "hex-nut", "jam-nut", "square-nut", "asme-b18-2-2", "inch"]

[parameters.size]
type = "choice"
default = "1/4-20"
choices = ["#0-80", "#1-64", "#1-72", "#2-56", "#2-64", "#3-48", "#3-56", "#4-40", "#4-48", "#5-40", "#5-44", "#6-32", "#6-40", "#8-32", "#8-36", "#10-24", "#10-32", "1/4-20", "1/4-28", "5/16-18", "5/16-24", "3/8-16", "3/8-24", "7/16-14", "7/16-20", "1/2-13", "1/2-20"]
label = "Thread"

[parameters.style]
type = "choice"
default = "hex"
choices = ["hex", "jam", "square"]
label = "Style"
description = "hex, jam (1/4 in and up) or square."

[parameters.material]
type = "choice"
default = "steel"
choices = ["steel", "stainless-18-8", "stainless-316"]
label = "Material"
description = "steel: carbon steel, zinc plated; stainless-18-8 (304) or stainless-316."

presets.toml 268 lines · TOML

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# Presets of this part (factory/PRESETS.md). Written by factory/gen.py.

[[presets]]

id = "hex-0-80"

title = "#0-80 hex nut"

params = { size = "#0-80", style = "hex" }

aliases = ["#0-80 hex nut", "ASME B18.2.2 #0-80 hex nut", "machine screw nut #0-80"]

standard = "ASME B18.2.2"

[[presets]]

id = "hex-2-56"

title = "#2-56 hex nut"

params = { size = "#2-56", style = "hex" }

aliases = ["#2-56 hex nut", "ASME B18.2.2 #2-56 hex nut", "machine screw nut #2-56"]

standard = "ASME B18.2.2"

[[presets]]

id = "hex-4-40"

title = "#4-40 hex nut"

params = { size = "#4-40", style = "hex" }

aliases = ["#4-40 hex nut", "ASME B18.2.2 #4-40 hex nut", "machine screw nut #4-40", "Nut 4-40"]

standard = "ASME B18.2.2"

[[presets]]

id = "hex-6-32"

title = "#6-32 hex nut"

params = { size = "#6-32", style = "hex" }

aliases = ["#6-32 hex nut", "ASME B18.2.2 #6-32 hex nut", "machine screw nut #6-32"]

standard = "ASME B18.2.2"

[[presets]]

id = "hex-8-32"

title = "#8-32 hex nut"

params = { size = "#8-32", style = "hex" }

aliases = ["#8-32 hex nut", "ASME B18.2.2 #8-32 hex nut", "machine screw nut #8-32"]

standard = "ASME B18.2.2"

[[presets]]

id = "hex-10-24"

title = "#10-24 hex nut"

params = { size = "#10-24", style = "hex" }

aliases = ["#10-24 hex nut", "ASME B18.2.2 #10-24 hex nut", "machine screw nut #10-24"]

standard = "ASME B18.2.2"

[[presets]]

id = "hex-10-32"

title = "#10-32 hex nut"

params = { size = "#10-32", style = "hex" }

aliases = ["#10-32 hex nut", "ASME B18.2.2 #10-32 hex nut", "machine screw nut #10-32"]

standard = "ASME B18.2.2"

[[presets]]

id = "hex-1-4-20"

title = "1/4-20 hex nut"

params = { size = "1/4-20", style = "hex" }

aliases = ["1/4-20 hex nut", "ASME B18.2.2 1/4-20 hex nut", "ANSI-ASME-B18.2.2 Hex Nut 1 4-20"]

standard = "ASME B18.2.2"

[[presets]]

id = "hex-1-4-28"

title = "1/4-28 hex nut"

params = { size = "1/4-28", style = "hex" }

aliases = ["1/4-28 hex nut", "ASME B18.2.2 1/4-28 hex nut"]

standard = "ASME B18.2.2"

[[presets]]

id = "hex-5-16-18"

title = "5/16-18 hex nut"

params = { size = "5/16-18", style = "hex" }

aliases = ["5/16-18 hex nut", "ASME B18.2.2 5/16-18 hex nut"]

standard = "ASME B18.2.2"

[[presets]]

id = "hex-5-16-24"

title = "5/16-24 hex nut"

params = { size = "5/16-24", style = "hex" }

aliases = ["5/16-24 hex nut", "ASME B18.2.2 5/16-24 hex nut"]

standard = "ASME B18.2.2"

[[presets]]

id = "hex-3-8-16"

title = "3/8-16 hex nut"

params = { size = "3/8-16", style = "hex" }

aliases = ["3/8-16 hex nut", "ASME B18.2.2 3/8-16 hex nut"]

standard = "ASME B18.2.2"

[[presets]]

id = "hex-3-8-24"

title = "3/8-24 hex nut"

params = { size = "3/8-24", style = "hex" }

aliases = ["3/8-24 hex nut", "ASME B18.2.2 3/8-24 hex nut"]

standard = "ASME B18.2.2"

[[presets]]

id = "hex-1-2-13"

title = "1/2-13 hex nut"

params = { size = "1/2-13", style = "hex" }

aliases = ["1/2-13 hex nut", "ASME B18.2.2 1/2-13 hex nut"]

standard = "ASME B18.2.2"

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[[presets]]

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id = "hex-1-2-20"

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title = "1/2-20 hex nut"

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params = { size = "1/2-20", style = "hex" }

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aliases = ["1/2-20 hex nut", "ASME B18.2.2 1/2-20 hex nut"]

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standard = "ASME B18.2.2"

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[[presets]]

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id = "jam-1-4-20"

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title = "1/4-20 hex jam nut"

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params = { size = "1/4-20", style = "jam" }

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aliases = ["1/4-20 hex jam nut", "ASME B18.2.2 1/4-20 hex jam nut"]

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standard = "ASME B18.2.2"

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[[presets]]

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id = "jam-1-4-28"

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title = "1/4-28 hex jam nut"

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params = { size = "1/4-28", style = "jam" }

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aliases = ["1/4-28 hex jam nut", "ASME B18.2.2 1/4-28 hex jam nut"]

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standard = "ASME B18.2.2"

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[[presets]]

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id = "jam-5-16-18"

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title = "5/16-18 hex jam nut"

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params = { size = "5/16-18", style = "jam" }

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aliases = ["5/16-18 hex jam nut", "ASME B18.2.2 5/16-18 hex jam nut"]

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standard = "ASME B18.2.2"

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[[presets]]

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id = "jam-5-16-24"

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title = "5/16-24 hex jam nut"

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params = { size = "5/16-24", style = "jam" }

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aliases = ["5/16-24 hex jam nut", "ASME B18.2.2 5/16-24 hex jam nut"]

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standard = "ASME B18.2.2"

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[[presets]]

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id = "jam-3-8-16"

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title = "3/8-16 hex jam nut"

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params = { size = "3/8-16", style = "jam" }

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aliases = ["3/8-16 hex jam nut", "ASME B18.2.2 3/8-16 hex jam nut"]

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standard = "ASME B18.2.2"

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[[presets]]

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id = "jam-3-8-24"

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title = "3/8-24 hex jam nut"

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params = { size = "3/8-24", style = "jam" }

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aliases = ["3/8-24 hex jam nut", "ASME B18.2.2 3/8-24 hex jam nut"]

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standard = "ASME B18.2.2"

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[[presets]]

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id = "jam-1-2-13"

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title = "1/2-13 hex jam nut"

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params = { size = "1/2-13", style = "jam" }

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aliases = ["1/2-13 hex jam nut", "ASME B18.2.2 1/2-13 hex jam nut"]

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standard = "ASME B18.2.2"

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[[presets]]

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id = "jam-1-2-20"

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title = "1/2-20 hex jam nut"

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params = { size = "1/2-20", style = "jam" }

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aliases = ["1/2-20 hex jam nut", "ASME B18.2.2 1/2-20 hex jam nut"]

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standard = "ASME B18.2.2"

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[[presets]]

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id = "square-0-80"

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title = "#0-80 square nut"

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params = { size = "#0-80", style = "square" }

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aliases = ["#0-80 square nut", "ASME B18.2.2 #0-80 square nut", "machine screw nut #0-80"]

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standard = "ASME B18.2.2"

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[[presets]]

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id = "square-2-56"

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title = "#2-56 square nut"

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params = { size = "#2-56", style = "square" }

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aliases = ["#2-56 square nut", "ASME B18.2.2 #2-56 square nut", "machine screw nut #2-56"]

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standard = "ASME B18.2.2"

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[[presets]]

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id = "square-4-40"

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title = "#4-40 square nut"

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params = { size = "#4-40", style = "square" }

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aliases = ["#4-40 square nut", "ASME B18.2.2 #4-40 square nut", "machine screw nut #4-40"]

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standard = "ASME B18.2.2"

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[[presets]]

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id = "square-6-32"

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title = "#6-32 square nut"

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params = { size = "#6-32", style = "square" }

189

aliases = ["#6-32 square nut", "ASME B18.2.2 #6-32 square nut", "machine screw nut #6-32"]

190

standard = "ASME B18.2.2"

191

192

[[presets]]

193

id = "square-8-32"

194

title = "#8-32 square nut"

195

params = { size = "#8-32", style = "square" }

196

aliases = ["#8-32 square nut", "ASME B18.2.2 #8-32 square nut", "machine screw nut #8-32"]

197

standard = "ASME B18.2.2"

198

199

[[presets]]

200

id = "square-10-24"

201

title = "#10-24 square nut"

202

params = { size = "#10-24", style = "square" }

203

aliases = ["#10-24 square nut", "ASME B18.2.2 #10-24 square nut", "machine screw nut #10-24"]

204

standard = "ASME B18.2.2"

205

206

[[presets]]

207

id = "square-10-32"

208

title = "#10-32 square nut"

209

params = { size = "#10-32", style = "square" }

210

aliases = ["#10-32 square nut", "ASME B18.2.2 #10-32 square nut", "machine screw nut #10-32"]

211

standard = "ASME B18.2.2"

212

213

[[presets]]

214

id = "square-1-4-20"

215

title = "1/4-20 square nut"

216

params = { size = "1/4-20", style = "square" }

217

aliases = ["1/4-20 square nut", "ASME B18.2.2 1/4-20 square nut"]

218

standard = "ASME B18.2.2"

219

220

[[presets]]

221

id = "square-1-4-28"

222

title = "1/4-28 square nut"

223

params = { size = "1/4-28", style = "square" }

224

aliases = ["1/4-28 square nut", "ASME B18.2.2 1/4-28 square nut"]

225

standard = "ASME B18.2.2"

226

227

[[presets]]

228

id = "square-5-16-18"

229

title = "5/16-18 square nut"

230

params = { size = "5/16-18", style = "square" }

231

aliases = ["5/16-18 square nut", "ASME B18.2.2 5/16-18 square nut"]

232

standard = "ASME B18.2.2"

233

234

[[presets]]

235

id = "square-5-16-24"

236

title = "5/16-24 square nut"

237

params = { size = "5/16-24", style = "square" }

238

aliases = ["5/16-24 square nut", "ASME B18.2.2 5/16-24 square nut"]

239

standard = "ASME B18.2.2"

240

241

[[presets]]

242

id = "square-3-8-16"

243

title = "3/8-16 square nut"

244

params = { size = "3/8-16", style = "square" }

245

aliases = ["3/8-16 square nut", "ASME B18.2.2 3/8-16 square nut"]

246

standard = "ASME B18.2.2"

247

248

[[presets]]

249

id = "square-3-8-24"

250

title = "3/8-24 square nut"

251

params = { size = "3/8-24", style = "square" }

252

aliases = ["3/8-24 square nut", "ASME B18.2.2 3/8-24 square nut"]

253

standard = "ASME B18.2.2"

254

255

[[presets]]

256

id = "square-1-2-13"

257

title = "1/2-13 square nut"

258

params = { size = "1/2-13", style = "square" }

259

aliases = ["1/2-13 square nut", "ASME B18.2.2 1/2-13 square nut"]

260

standard = "ASME B18.2.2"

261

262

[[presets]]

263

id = "square-1-2-20"

264

title = "1/2-20 square nut"

265

params = { size = "1/2-20", style = "square" }

266

aliases = ["1/2-20 square nut", "ASME B18.2.2 1/2-20 square nut"]

267

standard = "ASME B18.2.2"

268

# Presets of this part (factory/PRESETS.md). Written by factory/gen.py.

[[presets]]
id = "hex-0-80"
title = "#0-80 hex nut"
params = { size = "#0-80", style = "hex" }
aliases = ["#0-80 hex nut", "ASME B18.2.2 #0-80 hex nut", "machine screw nut #0-80"]
standard = "ASME B18.2.2"

[[presets]]
id = "hex-2-56"
title = "#2-56 hex nut"
params = { size = "#2-56", style = "hex" }
aliases = ["#2-56 hex nut", "ASME B18.2.2 #2-56 hex nut", "machine screw nut #2-56"]
standard = "ASME B18.2.2"

[[presets]]
id = "hex-4-40"
title = "#4-40 hex nut"
params = { size = "#4-40", style = "hex" }
aliases = ["#4-40 hex nut", "ASME B18.2.2 #4-40 hex nut", "machine screw nut #4-40", "Nut 4-40"]
standard = "ASME B18.2.2"

[[presets]]
id = "hex-6-32"
title = "#6-32 hex nut"
params = { size = "#6-32", style = "hex" }
aliases = ["#6-32 hex nut", "ASME B18.2.2 #6-32 hex nut", "machine screw nut #6-32"]
standard = "ASME B18.2.2"

[[presets]]
id = "hex-8-32"
title = "#8-32 hex nut"
params = { size = "#8-32", style = "hex" }
aliases = ["#8-32 hex nut", "ASME B18.2.2 #8-32 hex nut", "machine screw nut #8-32"]
standard = "ASME B18.2.2"

[[presets]]
id = "hex-10-24"
title = "#10-24 hex nut"
params = { size = "#10-24", style = "hex" }
aliases = ["#10-24 hex nut", "ASME B18.2.2 #10-24 hex nut", "machine screw nut #10-24"]
standard = "ASME B18.2.2"

[[presets]]
id = "hex-10-32"
title = "#10-32 hex nut"
params = { size = "#10-32", style = "hex" }
aliases = ["#10-32 hex nut", "ASME B18.2.2 #10-32 hex nut", "machine screw nut #10-32"]
standard = "ASME B18.2.2"

[[presets]]
id = "hex-1-4-20"
title = "1/4-20 hex nut"
params = { size = "1/4-20", style = "hex" }
aliases = ["1/4-20 hex nut", "ASME B18.2.2 1/4-20 hex nut", "ANSI-ASME-B18.2.2 Hex Nut 1 4-20"]
standard = "ASME B18.2.2"

[[presets]]
id = "hex-1-4-28"
title = "1/4-28 hex nut"
params = { size = "1/4-28", style = "hex" }
aliases = ["1/4-28 hex nut", "ASME B18.2.2 1/4-28 hex nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "hex-5-16-18"
title = "5/16-18 hex nut"
params = { size = "5/16-18", style = "hex" }
aliases = ["5/16-18 hex nut", "ASME B18.2.2 5/16-18 hex nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "hex-5-16-24"
title = "5/16-24 hex nut"
params = { size = "5/16-24", style = "hex" }
aliases = ["5/16-24 hex nut", "ASME B18.2.2 5/16-24 hex nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "hex-3-8-16"
title = "3/8-16 hex nut"
params = { size = "3/8-16", style = "hex" }
aliases = ["3/8-16 hex nut", "ASME B18.2.2 3/8-16 hex nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "hex-3-8-24"
title = "3/8-24 hex nut"
params = { size = "3/8-24", style = "hex" }
aliases = ["3/8-24 hex nut", "ASME B18.2.2 3/8-24 hex nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "hex-1-2-13"
title = "1/2-13 hex nut"
params = { size = "1/2-13", style = "hex" }
aliases = ["1/2-13 hex nut", "ASME B18.2.2 1/2-13 hex nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "hex-1-2-20"
title = "1/2-20 hex nut"
params = { size = "1/2-20", style = "hex" }
aliases = ["1/2-20 hex nut", "ASME B18.2.2 1/2-20 hex nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "jam-1-4-20"
title = "1/4-20 hex jam nut"
params = { size = "1/4-20", style = "jam" }
aliases = ["1/4-20 hex jam nut", "ASME B18.2.2 1/4-20 hex jam nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "jam-1-4-28"
title = "1/4-28 hex jam nut"
params = { size = "1/4-28", style = "jam" }
aliases = ["1/4-28 hex jam nut", "ASME B18.2.2 1/4-28 hex jam nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "jam-5-16-18"
title = "5/16-18 hex jam nut"
params = { size = "5/16-18", style = "jam" }
aliases = ["5/16-18 hex jam nut", "ASME B18.2.2 5/16-18 hex jam nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "jam-5-16-24"
title = "5/16-24 hex jam nut"
params = { size = "5/16-24", style = "jam" }
aliases = ["5/16-24 hex jam nut", "ASME B18.2.2 5/16-24 hex jam nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "jam-3-8-16"
title = "3/8-16 hex jam nut"
params = { size = "3/8-16", style = "jam" }
aliases = ["3/8-16 hex jam nut", "ASME B18.2.2 3/8-16 hex jam nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "jam-3-8-24"
title = "3/8-24 hex jam nut"
params = { size = "3/8-24", style = "jam" }
aliases = ["3/8-24 hex jam nut", "ASME B18.2.2 3/8-24 hex jam nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "jam-1-2-13"
title = "1/2-13 hex jam nut"
params = { size = "1/2-13", style = "jam" }
aliases = ["1/2-13 hex jam nut", "ASME B18.2.2 1/2-13 hex jam nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "jam-1-2-20"
title = "1/2-20 hex jam nut"
params = { size = "1/2-20", style = "jam" }
aliases = ["1/2-20 hex jam nut", "ASME B18.2.2 1/2-20 hex jam nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "square-0-80"
title = "#0-80 square nut"
params = { size = "#0-80", style = "square" }
aliases = ["#0-80 square nut", "ASME B18.2.2 #0-80 square nut", "machine screw nut #0-80"]
standard = "ASME B18.2.2"

[[presets]]
id = "square-2-56"
title = "#2-56 square nut"
params = { size = "#2-56", style = "square" }
aliases = ["#2-56 square nut", "ASME B18.2.2 #2-56 square nut", "machine screw nut #2-56"]
standard = "ASME B18.2.2"

[[presets]]
id = "square-4-40"
title = "#4-40 square nut"
params = { size = "#4-40", style = "square" }
aliases = ["#4-40 square nut", "ASME B18.2.2 #4-40 square nut", "machine screw nut #4-40"]
standard = "ASME B18.2.2"

[[presets]]
id = "square-6-32"
title = "#6-32 square nut"
params = { size = "#6-32", style = "square" }
aliases = ["#6-32 square nut", "ASME B18.2.2 #6-32 square nut", "machine screw nut #6-32"]
standard = "ASME B18.2.2"

[[presets]]
id = "square-8-32"
title = "#8-32 square nut"
params = { size = "#8-32", style = "square" }
aliases = ["#8-32 square nut", "ASME B18.2.2 #8-32 square nut", "machine screw nut #8-32"]
standard = "ASME B18.2.2"

[[presets]]
id = "square-10-24"
title = "#10-24 square nut"
params = { size = "#10-24", style = "square" }
aliases = ["#10-24 square nut", "ASME B18.2.2 #10-24 square nut", "machine screw nut #10-24"]
standard = "ASME B18.2.2"

[[presets]]
id = "square-10-32"
title = "#10-32 square nut"
params = { size = "#10-32", style = "square" }
aliases = ["#10-32 square nut", "ASME B18.2.2 #10-32 square nut", "machine screw nut #10-32"]
standard = "ASME B18.2.2"

[[presets]]
id = "square-1-4-20"
title = "1/4-20 square nut"
params = { size = "1/4-20", style = "square" }
aliases = ["1/4-20 square nut", "ASME B18.2.2 1/4-20 square nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "square-1-4-28"
title = "1/4-28 square nut"
params = { size = "1/4-28", style = "square" }
aliases = ["1/4-28 square nut", "ASME B18.2.2 1/4-28 square nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "square-5-16-18"
title = "5/16-18 square nut"
params = { size = "5/16-18", style = "square" }
aliases = ["5/16-18 square nut", "ASME B18.2.2 5/16-18 square nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "square-5-16-24"
title = "5/16-24 square nut"
params = { size = "5/16-24", style = "square" }
aliases = ["5/16-24 square nut", "ASME B18.2.2 5/16-24 square nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "square-3-8-16"
title = "3/8-16 square nut"
params = { size = "3/8-16", style = "square" }
aliases = ["3/8-16 square nut", "ASME B18.2.2 3/8-16 square nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "square-3-8-24"
title = "3/8-24 square nut"
params = { size = "3/8-24", style = "square" }
aliases = ["3/8-24 square nut", "ASME B18.2.2 3/8-24 square nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "square-1-2-13"
title = "1/2-13 square nut"
params = { size = "1/2-13", style = "square" }
aliases = ["1/2-13 square nut", "ASME B18.2.2 1/2-13 square nut"]
standard = "ASME B18.2.2"

[[presets]]
id = "square-1-2-20"
title = "1/2-20 square nut"
params = { size = "1/2-20", style = "square" }
aliases = ["1/2-20 square nut", "ASME B18.2.2 1/2-20 square nut"]
standard = "ASME B18.2.2"

README.md 68 lines · Markdown

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Nut, inch (ASME B18.2.2)

Hex nuts, hex jam nuts and square nuts for Unified inch threads (UNC and UNF) #0-80 to 1/2-20. Presets cover the catalogue's hex, jam and square nuts.

Geometry

Envelope for assemblies: a hexagonal or square prism, width across flats F, thickness H (corner chamfers and bearing-face washers are not modelled), with a plain bore at the basic major diameter D; the thread is not modelled. The nut sits on the XY plane, centred on the origin; a hexagon's corners point along X, a square's sides are parallel to X and Y.

Parameters

Parameter	Meaning
`size`	Thread, #0-80 to 1/2-20 (UNC and UNF)
`style`	`hex`, `jam` (1/4 to 1/2 in only) or `square`
`material`	`steel` (carbon steel, zinc plated), `stainless-18-8` (304), `stainless-316`

Sources

D, basic major diameter: ASME B1.1-1989 (R2001), Unified Inch Screw Threads, external thread table, column "Major Diameter Basic", as reproduced at https://www.engineersedge.com/screw_threads_chart.htm.
#0 to #10, square and hex machine screw nuts: ASME B18.2.2, Nuts for General Applications: Machine Screw Nuts, Hex, Square, Hex Flange, and Coupling Nuts (Inch Series), Table 1-1 (2010 edition; Table 1.1.1-1 in the 2022 edition): F basic, thickness H max (the table gives the thickness as min / max only). Read from https://www.fasten.it/Norms/Norm/ASME_B18.2.2_TABLE_1-1 ("Publication date: 2010"), checked against https://www.engineersedge.com/hardware/hexagon_machine_screw_nuts_14062.htm (ANSI B18.6.3-1991, the earlier home of these nuts; same values, F basic as fractions). Machine screw nuts moved from B18.6.3 to B18.2.2; B18.6.3-2013 has no nut table. There is no machine screw jam nut, so the catalogue's numbered-size jam nuts are left out.
1/4 to 1/2, hex nuts and hex jam nuts: ASME B18.2.2, F basic, H basic: https://www.engineersedge.com/hex_nut.htm, https://amesweb.info/Fasteners/Nut/Hex-Nut-Sizes-Dimensions-Table.aspx (B18.2.2-2010 via Machinery's Handbook 30th ed.), jam nuts also https://www.aftfasteners.com/hex-jam-nuts-dimensions-technical-information/ (ANSI/ASME B18.2.2-1987).
1/4 to 1/2, square nuts: ASME B18.2.2-2010 (via Machinery's Handbook 30th ed.), F basic, H basic: https://amesweb.info/Fasteners/Nut/Square-Nuts-Dimensions.aspx.

The values are the same in the 1987, 2010 and 2022 editions as far as these reproductions show; the citation is ASME B18.2.2-2022 (Tables 1.1.1-1, 1.1.1-3 and 1.1.1-5, numbering from ASME's table of contents https://www.asme.org/getmedia/a5d59a0e-7d26-4b87-aa17-d45e8fcf48e4/B18-2-2_2022_ToC.pdf). Inch values as printed in the tables; the model converts them to millimetres (1 in = 25.4 mm).

Size	D	Hex F × H	Jam F × H	Square F × H
#0	0.06	0.15625 × 0.050	–	0.15625 × 0.050
#1	0.073	0.15625 × 0.050	–	0.15625 × 0.050
#2	0.086	0.1875 × 0.066	–	0.1875 × 0.066
#3	0.099	0.1875 × 0.066	–	0.1875 × 0.066
#4	0.112	0.25 × 0.098	–	0.25 × 0.098
#5	0.125	0.3125 × 0.114	–	0.3125 × 0.114
#6	0.138	0.3125 × 0.114	–	0.3125 × 0.114
#8	0.164	0.34375 × 0.130	–	0.34375 × 0.130
#10	0.19	0.375 × 0.130	–	0.375 × 0.130
1/4	0.25	0.4375 × 0.21875	0.4375 × 0.15625	0.4375 × 0.21875
5/16	0.3125	0.5 × 0.265625	0.5 × 0.1875	0.5625 × 0.265625
3/8	0.375	0.5625 × 0.328125	0.5625 × 0.21875	0.625 × 0.328125
7/16	0.4375	0.6875 × 0.375	0.6875 × 0.25	0.75 × 0.375
1/2	0.5	0.75 × 0.4375	0.75 × 0.3125	0.8125 × 0.4375

Corrected in this audit: the #0 to #10 thicknesses were "basic" fractions no edition of the table gives (3/64, 1/16, 3/32, 7/64, 1/8); they are now the table's H max (0.050, 0.066, 0.098, 0.114, 0.130), and the #0 to #10 presets cite ASME B18.2.2 instead of B18.6.3.

Not covered (no sourced table): nylon-insert and all-metal lock nuts, flange nuts, acorn nuts.

Preset list: sizes of the step.parts catalogue (MIT), see library/NOTICE.md.

# Nut, inch (ASME B18.2.2)

Hex nuts, hex jam nuts and square nuts for Unified inch threads (UNC and UNF) #0-80 to 1/2-20. Presets cover the

catalogue's hex, jam and square nuts.

## Geometry

Envelope for assemblies: a hexagonal or square prism, width across flats **F**, thickness **H** (corner chamfers and

bearing-face washers are not modelled), with a plain bore at the basic major diameter **D**; the thread is not

modelled. The nut sits on the XY plane, centred on the origin; a hexagon's corners point along X, a square's sides

are parallel to X and Y.

## Parameters

| Parameter | Meaning |

|---|---|

| `size` | Thread, #0-80 to 1/2-20 (UNC and UNF) |

| `style` | `hex`, `jam` (1/4 to 1/2 in only) or `square` |

| `material` | `steel` (carbon steel, zinc plated), `stainless-18-8` (304), `stainless-316` |

## Sources

- **D**, basic major diameter: ASME B1.1-1989 (R2001), *Unified Inch Screw Threads*, external thread table, column

"Major Diameter Basic", as reproduced at <https://www.engineersedge.com/screw_threads_chart.htm>.

- **#0 to #10**, square and hex machine screw nuts: ASME B18.2.2, *Nuts for General Applications: Machine Screw Nuts,

Hex, Square, Hex Flange, and Coupling Nuts (Inch Series)*, Table 1-1 (2010 edition; Table 1.1.1-1 in the 2022

edition): F **basic**, thickness H **max** (the table gives the thickness as min / max only). Read from

<https://www.fasten.it/Norms/Norm/ASME_B18.2.2_TABLE_1-1> ("Publication date: 2010"), checked against

<https://www.engineersedge.com/hardware/hexagon_machine_screw_nuts_14062.htm> (ANSI B18.6.3-1991, the earlier home of

these nuts; same values, F basic as fractions). Machine screw nuts moved from B18.6.3 to B18.2.2; B18.6.3-2013 has

no nut table. There is no machine screw jam nut, so the catalogue's numbered-size jam nuts are left out.

- **1/4 to 1/2**, hex nuts and hex jam nuts: ASME B18.2.2, F **basic**, H **basic**:

<https://www.engineersedge.com/hex_nut.htm>, <https://amesweb.info/Fasteners/Nut/Hex-Nut-Sizes-Dimensions-Table.aspx>

(B18.2.2-2010 via Machinery's Handbook 30th ed.), jam nuts also

<https://www.aftfasteners.com/hex-jam-nuts-dimensions-technical-information/> (ANSI/ASME B18.2.2-1987).

- **1/4 to 1/2**, square nuts: ASME B18.2.2-2010 (via Machinery's Handbook 30th ed.), F **basic**, H **basic**:

<https://amesweb.info/Fasteners/Nut/Square-Nuts-Dimensions.aspx>.

The values are the same in the 1987, 2010 and 2022 editions as far as these reproductions show; the citation is

ASME B18.2.2-2022 (Tables 1.1.1-1, 1.1.1-3 and 1.1.1-5, numbering from ASME's table of contents

<https://www.asme.org/getmedia/a5d59a0e-7d26-4b87-aa17-d45e8fcf48e4/B18-2-2_2022_ToC.pdf>). Inch values as printed

in the tables; the model converts them to millimetres (1 in = 25.4 mm).

|---|---|---|---|---|

| #0 | 0.06 | 0.15625 × 0.050 | – | 0.15625 × 0.050 |

| #1 | 0.073 | 0.15625 × 0.050 | – | 0.15625 × 0.050 |

| #2 | 0.086 | 0.1875 × 0.066 | – | 0.1875 × 0.066 |

| #3 | 0.099 | 0.1875 × 0.066 | – | 0.1875 × 0.066 |

| #4 | 0.112 | 0.25 × 0.098 | – | 0.25 × 0.098 |

| #5 | 0.125 | 0.3125 × 0.114 | – | 0.3125 × 0.114 |

| #6 | 0.138 | 0.3125 × 0.114 | – | 0.3125 × 0.114 |

| #8 | 0.164 | 0.34375 × 0.130 | – | 0.34375 × 0.130 |

| #10 | 0.19 | 0.375 × 0.130 | – | 0.375 × 0.130 |

| 1/4 | 0.25 | 0.4375 × 0.21875 | 0.4375 × 0.15625 | 0.4375 × 0.21875 |

| 5/16 | 0.3125 | 0.5 × 0.265625 | 0.5 × 0.1875 | 0.5625 × 0.265625 |

| 3/8 | 0.375 | 0.5625 × 0.328125 | 0.5625 × 0.21875 | 0.625 × 0.328125 |

| 7/16 | 0.4375 | 0.6875 × 0.375 | 0.6875 × 0.25 | 0.75 × 0.375 |

| 1/2 | 0.5 | 0.75 × 0.4375 | 0.75 × 0.3125 | 0.8125 × 0.4375 |

Corrected in this audit: the #0 to #10 thicknesses were "basic" fractions no edition of the table gives

(3/64, 1/16, 3/32, 7/64, 1/8); they are now the table's H max (0.050, 0.066, 0.098, 0.114, 0.130), and the

#0 to #10 presets cite ASME B18.2.2 instead of B18.6.3.

Not covered (no sourced table): nylon-insert and all-metal lock nuts, flange nuts, acorn nuts.

Preset list: sizes of the step.parts catalogue (MIT), see `library/NOTICE.md`.

# Nut, inch (ASME B18.2.2)

Hex nuts, hex jam nuts and square nuts for Unified inch threads (UNC and UNF) #0-80 to 1/2-20. Presets cover the
catalogue's hex, jam and square nuts.

## Geometry

Envelope for assemblies: a hexagonal or square prism, width across flats **F**, thickness **H** (corner chamfers and
bearing-face washers are not modelled), with a plain bore at the basic major diameter **D**; the thread is not
modelled. The nut sits on the XY plane, centred on the origin; a hexagon's corners point along X, a square's sides
are parallel to X and Y.

## Parameters

| Parameter | Meaning |
|---|---|
| `size` | Thread, #0-80 to 1/2-20 (UNC and UNF) |
| `style` | `hex`, `jam` (1/4 to 1/2 in only) or `square` |
| `material` | `steel` (carbon steel, zinc plated), `stainless-18-8` (304), `stainless-316` |

## Sources

- **D**, basic major diameter: ASME B1.1-1989 (R2001), *Unified Inch Screw Threads*, external thread table, column
  "Major Diameter Basic", as reproduced at <https://www.engineersedge.com/screw_threads_chart.htm>.
- **#0 to #10**, square and hex machine screw nuts: ASME B18.2.2, *Nuts for General Applications: Machine Screw Nuts,
  Hex, Square, Hex Flange, and Coupling Nuts (Inch Series)*, Table 1-1 (2010 edition; Table 1.1.1-1 in the 2022
  edition): F **basic**, thickness H **max** (the table gives the thickness as min / max only). Read from
  <https://www.fasten.it/Norms/Norm/ASME_B18.2.2_TABLE_1-1> ("Publication date: 2010"), checked against
  <https://www.engineersedge.com/hardware/hexagon_machine_screw_nuts_14062.htm> (ANSI B18.6.3-1991, the earlier home of
  these nuts; same values, F basic as fractions). Machine screw nuts moved from B18.6.3 to B18.2.2; B18.6.3-2013 has
  no nut table. There is no machine screw jam nut, so the catalogue's numbered-size jam nuts are left out.
- **1/4 to 1/2**, hex nuts and hex jam nuts: ASME B18.2.2, F **basic**, H **basic**:
  <https://www.engineersedge.com/hex_nut.htm>, <https://amesweb.info/Fasteners/Nut/Hex-Nut-Sizes-Dimensions-Table.aspx>
  (B18.2.2-2010 via Machinery's Handbook 30th ed.), jam nuts also
  <https://www.aftfasteners.com/hex-jam-nuts-dimensions-technical-information/> (ANSI/ASME B18.2.2-1987).
- **1/4 to 1/2**, square nuts: ASME B18.2.2-2010 (via Machinery's Handbook 30th ed.), F **basic**, H **basic**:
  <https://amesweb.info/Fasteners/Nut/Square-Nuts-Dimensions.aspx>.

The values are the same in the 1987, 2010 and 2022 editions as far as these reproductions show; the citation is
ASME B18.2.2-2022 (Tables 1.1.1-1, 1.1.1-3 and 1.1.1-5, numbering from ASME's table of contents
<https://www.asme.org/getmedia/a5d59a0e-7d26-4b87-aa17-d45e8fcf48e4/B18-2-2_2022_ToC.pdf>). Inch values as printed
in the tables; the model converts them to millimetres (1 in = 25.4 mm).

| Size | D | Hex F × H | Jam F × H | Square F × H |
|---|---|---|---|---|
| #0 | 0.06 | 0.15625 × 0.050 | – | 0.15625 × 0.050 |
| #1 | 0.073 | 0.15625 × 0.050 | – | 0.15625 × 0.050 |
| #2 | 0.086 | 0.1875 × 0.066 | – | 0.1875 × 0.066 |
| #3 | 0.099 | 0.1875 × 0.066 | – | 0.1875 × 0.066 |
| #4 | 0.112 | 0.25 × 0.098 | – | 0.25 × 0.098 |
| #5 | 0.125 | 0.3125 × 0.114 | – | 0.3125 × 0.114 |
| #6 | 0.138 | 0.3125 × 0.114 | – | 0.3125 × 0.114 |
| #8 | 0.164 | 0.34375 × 0.130 | – | 0.34375 × 0.130 |
| #10 | 0.19 | 0.375 × 0.130 | – | 0.375 × 0.130 |
| 1/4 | 0.25 | 0.4375 × 0.21875 | 0.4375 × 0.15625 | 0.4375 × 0.21875 |
| 5/16 | 0.3125 | 0.5 × 0.265625 | 0.5 × 0.1875 | 0.5625 × 0.265625 |
| 3/8 | 0.375 | 0.5625 × 0.328125 | 0.5625 × 0.21875 | 0.625 × 0.328125 |
| 7/16 | 0.4375 | 0.6875 × 0.375 | 0.6875 × 0.25 | 0.75 × 0.375 |
| 1/2 | 0.5 | 0.75 × 0.4375 | 0.75 × 0.3125 | 0.8125 × 0.4375 |

Corrected in this audit: the #0 to #10 thicknesses were "basic" fractions no edition of the table gives
(3/64, 1/16, 3/32, 7/64, 1/8); they are now the table's H max (0.050, 0.066, 0.098, 0.114, 0.130), and the
#0 to #10 presets cite ASME B18.2.2 instead of B18.6.3.

Not covered (no sourced table): nylon-insert and all-metal lock nuts, flange nuts, acorn nuts.

Preset list: sizes of the step.parts catalogue (MIT), see `library/NOTICE.md`.

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The version's JSON (parameters, presets, files); add /build?name=value for a build at other values.

About this part

steve58 parts

Profile

Steel (generic)Carbon & alloy steels · Custom finish · 7.9 g/cm³

Mass: 3.3 g

At the parameters shown in the viewer.

License: MIT

Permissive: use, change and sell it; keep the copyright notice.

Runtime: STEVE
Built with: CadQuery 2.9.0.dev0
Published: Nov 1, 2026
Downloads: 0
Builds: 0
Stars: 0
Bundle: 13917eb01ef8…

#fastener #nut #hex-nut #jam-nut #square-nut #asme-b18-2-2 #inch

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Nut for Unified inch threads: hex nuts and square nuts to ASME B18.2.2 (machine screw nuts for #0 to #10, hex and square nuts for 1/4 to 1/2 in) and hex jam nuts (1/4 to 1/2 in only). Envelope geometry for assemblies: a hexagonal or square prism (width across flats F, thickness H; corner chamfers not modelled) with a plain bore at the ASME B1.1 basic major diameter; the thread itself is not modelled. It sits on the XY plane, centred on the origin (the model is in millimetres). Dimensions: see the README.

Nut, inch (ASME B18.2.2)

Hex nuts, hex jam nuts and square nuts for Unified inch threads (UNC and UNF) #0-80 to 1/2-20. Presets cover the catalogue's hex, jam and square nuts.

Geometry

Parameters

Parameter	Meaning
`size`	Thread, #0-80 to 1/2-20 (UNC and UNF)
`style`	`hex`, `jam` (1/4 to 1/2 in only) or `square`
`material`	`steel` (carbon steel, zinc plated), `stainless-18-8` (304), `stainless-316`

Sources

D, basic major diameter: ASME B1.1-1989 (R2001), Unified Inch Screw Threads, external thread table, column "Major Diameter Basic", as reproduced at https://www.engineersedge.com/screw_threads_chart.htm.
#0 to #10, square and hex machine screw nuts: ASME B18.2.2, Nuts for General Applications: Machine Screw Nuts, Hex, Square, Hex Flange, and Coupling Nuts (Inch Series), Table 1-1 (2010 edition; Table 1.1.1-1 in the 2022 edition): F basic, thickness H max (the table gives the thickness as min / max only). Read from https://www.fasten.it/Norms/Norm/ASME_B18.2.2_TABLE_1-1 ("Publication date: 2010"), checked against https://www.engineersedge.com/hardware/hexagon_machine_screw_nuts_14062.htm (ANSI B18.6.3-1991, the earlier home of these nuts; same values, F basic as fractions). Machine screw nuts moved from B18.6.3 to B18.2.2; B18.6.3-2013 has no nut table. There is no machine screw jam nut, so the catalogue's numbered-size jam nuts are left out.
1/4 to 1/2, hex nuts and hex jam nuts: ASME B18.2.2, F basic, H basic: https://www.engineersedge.com/hex_nut.htm, https://amesweb.info/Fasteners/Nut/Hex-Nut-Sizes-Dimensions-Table.aspx (B18.2.2-2010 via Machinery's Handbook 30th ed.), jam nuts also https://www.aftfasteners.com/hex-jam-nuts-dimensions-technical-information/ (ANSI/ASME B18.2.2-1987).
1/4 to 1/2, square nuts: ASME B18.2.2-2010 (via Machinery's Handbook 30th ed.), F basic, H basic: https://amesweb.info/Fasteners/Nut/Square-Nuts-Dimensions.aspx.

Size	D	Hex F × H	Jam F × H	Square F × H
#0	0.06	0.15625 × 0.050	–	0.15625 × 0.050
#1	0.073	0.15625 × 0.050	–	0.15625 × 0.050
#2	0.086	0.1875 × 0.066	–	0.1875 × 0.066
#3	0.099	0.1875 × 0.066	–	0.1875 × 0.066
#4	0.112	0.25 × 0.098	–	0.25 × 0.098
#5	0.125	0.3125 × 0.114	–	0.3125 × 0.114
#6	0.138	0.3125 × 0.114	–	0.3125 × 0.114
#8	0.164	0.34375 × 0.130	–	0.34375 × 0.130
#10	0.19	0.375 × 0.130	–	0.375 × 0.130
1/4	0.25	0.4375 × 0.21875	0.4375 × 0.15625	0.4375 × 0.21875
5/16	0.3125	0.5 × 0.265625	0.5 × 0.1875	0.5625 × 0.265625
3/8	0.375	0.5625 × 0.328125	0.5625 × 0.21875	0.625 × 0.328125
7/16	0.4375	0.6875 × 0.375	0.6875 × 0.25	0.75 × 0.375
1/2	0.5	0.75 × 0.4375	0.75 × 0.3125	0.8125 × 0.4375

Not covered (no sourced table): nylon-insert and all-metal lock nuts, flange nuts, acorn nuts.

Preset list: sizes of the step.parts catalogue (MIT), see library/NOTICE.md.

1.0.0 Latest Nov 1, 2026 · 1 day ago

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steve/inch-nut

Nut, inch (ASME B18.2.2)

Geometry

Parameters

Sources

Nut, inch (ASME B18.2.2)

Geometry

Parameters

Sources

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