steve/set-screw

Hexagon socket set screw with flat point, ISO 4026 / DIN 913, M3 to M12, length from d, with catalogue sizes as presets.

v1.0.0 Latest STEVE MIT 0

Open in STEVE

Isometric

Parameters

Preset30 sizes

Thread size7 options

Length2–100 mm

Nominal length l, overall; at least d (ISO 4026 has no shorter screws).

Material3 options

steel: property class 45H, black oxide; stainless-a2 / stainless-a4: ISO 3506-3 A2 / A4.

Defaults built

part.py 50 lines · Python · STEVE runtime · checked

Download

"""Hexagon socket set screw with flat point, ISO 4026 (DIN 913), M3 to M12, length l >= d.

Envelope model for assemblies: plain cylinder at the nominal thread diameter d (the thread is not modelled), hexagon

socket (key size s, depth t min for the length) at one end and a flat point of diameter dp max at the other, chamfered at 45°.

The socket end is on the XY plane at the origin, the screw along -Z; `length` is the nominal (overall) length l.

"""

from steve import Model

size = "M5" # Thread size

length = 8 # mm Nominal length (overall)

material = "steel" # Material

# ISO 4026:2003, Table 1 (official preview p. 3:

# https://cdn.standards.iteh.ai/samples/36431/f53ced64ab1946679bd80f0a0e6cac63/ISO-4026-2003.pdf; also

# https://fasten.it/en/Norms/Norm/DIN%20EN%20ISO%204026, DIN EN ISO 4026:2004-05).

# size: (thread d, flat point diameter dp max, hexagon socket s nominal, socket depth t min for the shortest length

# (footnote d: lengths in the shaded cells, which are l = d for M3 to M12), t min for longer lengths (footnote e))

DIMENSIONS = {

"M3": (3.0, 2.0, 1.5, 1.2, 2.0),

"M4": (4.0, 2.5, 2.0, 1.5, 2.5),

"M5": (5.0, 3.5, 2.5, 2.0, 3.0),

"M6": (6.0, 4.0, 3.0, 2.0, 3.5),

"M8": (8.0, 5.5, 4.0, 3.0, 5.0),

"M10": (10.0, 7.0, 5.0, 4.0, 6.0),

"M12": (12.0, 8.5, 6.0, 4.8, 8.0),

}

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

MATERIALS = {

"steel": ("steel-generic", "#2b2d30"), # property class 45H, black oxide finish

"stainless-a2": ("stainless-304", "#c9ccd0"), # ISO 3506-3 A2-21H

"stainless-a4": ("stainless-316", "#c9ccd0"), # ISO 3506-3 A4-21H

}

d, dp, s, t_short, t_long = DIMENSIONS[size]

if length < d:

raise ValueError(f"ISO 4026 has no {size} screw shorter than {d:g} mm (its socket depth isn't defined there)")

t = t_short if length <= d else t_long # the shaded (shortest) length is l = d for every size here

material_id, colour = MATERIALS[material]

point = (d - dp) / 2 # 45° chamfer from d down to the flat point dp

model = Model()

with model.sketch("profile", on="XZ", name="Profile") as sk:

sk.polyline("outline", [(0, 0), (d / 2, 0), (d / 2, -(length - point)), (dp / 2, -length), (0, -length)])

model.revolve("body", "profile", axis="Z", name="Screw")

with model.sketch("socket_sketch", on="XY", name="Hexagon socket") as sk:

sk.polygon("hex", (0, 0), s / 2, 6, inscribed=False)

model.extrude("socket", "socket_sketch", distance=-t, op="cut", name="Socket")

model.material(material_id, color=colour)

result = model.result()

"""Hexagon socket set screw with flat point, ISO 4026 (DIN 913), M3 to M12, length l >= d.

Envelope model for assemblies: plain cylinder at the nominal thread diameter d (the thread is not modelled), hexagon
socket (key size s, depth t min for the length) at one end and a flat point of diameter dp max at the other, chamfered at 45°.
The socket end is on the XY plane at the origin, the screw along -Z; `length` is the nominal (overall) length l.
"""
from steve import Model

size = "M5"  # Thread size
length = 8  # mm Nominal length (overall)
material = "steel"  # Material

# ISO 4026:2003, Table 1 (official preview p. 3:
# https://cdn.standards.iteh.ai/samples/36431/f53ced64ab1946679bd80f0a0e6cac63/ISO-4026-2003.pdf; also
# https://fasten.it/en/Norms/Norm/DIN%20EN%20ISO%204026, DIN EN ISO 4026:2004-05).
# size: (thread d, flat point diameter dp max, hexagon socket s nominal, socket depth t min for the shortest length
# (footnote d: lengths in the shaded cells, which are l = d for M3 to M12), t min for longer lengths (footnote e))
DIMENSIONS = {
    "M3": (3.0, 2.0, 1.5, 1.2, 2.0),
    "M4": (4.0, 2.5, 2.0, 1.5, 2.5),
    "M5": (5.0, 3.5, 2.5, 2.0, 3.0),
    "M6": (6.0, 4.0, 3.0, 2.0, 3.5),
    "M8": (8.0, 5.5, 4.0, 3.0, 5.0),
    "M10": (10.0, 7.0, 5.0, 4.0, 6.0),
    "M12": (12.0, 8.5, 6.0, 4.8, 8.0),
}
# material choice: (STEVE material library id, appearance colour)
MATERIALS = {
    "steel": ("steel-generic", "#2b2d30"),        # property class 45H, black oxide finish
    "stainless-a2": ("stainless-304", "#c9ccd0"),  # ISO 3506-3 A2-21H
    "stainless-a4": ("stainless-316", "#c9ccd0"),  # ISO 3506-3 A4-21H
}

d, dp, s, t_short, t_long = DIMENSIONS[size]
if length < d:
    raise ValueError(f"ISO 4026 has no {size} screw shorter than {d:g} mm (its socket depth isn't defined there)")
t = t_short if length <= d else t_long   # the shaded (shortest) length is l = d for every size here
material_id, colour = MATERIALS[material]
point = (d - dp) / 2  # 45° chamfer from d down to the flat point dp

model = Model()
with model.sketch("profile", on="XZ", name="Profile") as sk:
    sk.polyline("outline", [(0, 0), (d / 2, 0), (d / 2, -(length - point)), (dp / 2, -length), (0, -length)])
model.revolve("body", "profile", axis="Z", name="Screw")
with model.sketch("socket_sketch", on="XY", name="Hexagon socket") as sk:
    sk.polygon("hex", (0, 0), s / 2, 6, inscribed=False)
model.extrude("socket", "socket_sketch", distance=-t, op="cut", name="Socket")
model.material(material_id, color=colour)
result = model.result()

pypart.toml 246 lines · TOML

Download

name = "steve/set-screw"

version = "1.0.0"

runtime = "steve"

license = "MIT"

summary = "Hexagon socket set screw with flat point, ISO 4026 / DIN 913, M3 to M12, length from d, with catalogue sizes as presets."

description = """ISO 4026 (DIN 913) hexagon socket set screw with flat point (grub screw). Envelope geometry for \

assemblies: a plain cylinder at the nominal thread diameter, hexagon socket (s, t min) and a flat point (dp max, \

45° chamfer); the thread itself is not modelled.

The socket end is on the XY plane at the origin and the screw points along -Z; `length` is the overall length. \

Dimensions from ISO 4026:2003 Table 1 (see the README)."""

tags = ["fastener", "screw", "set-screw", "grub-screw", "iso-4026", "din-913", "metric"]

[parameters.size]

type = "choice"

default = "M5"

choices = ["M3", "M4", "M5", "M6", "M8", "M10", "M12"]

label = "Thread size"

[parameters.length]

type = "number"

default = 8

min = 2

max = 100

step = 1

unit = "mm"

label = "Length"

description = "Nominal length l, overall; at least d (ISO 4026 has no shorter screws)."

[parameters.material]

type = "choice"

default = "steel"

choices = ["steel", "stainless-a2", "stainless-a4"]

label = "Material"

description = "steel: property class 45H, black oxide; stainless-a2 / stainless-a4: ISO 3506-3 A2 / A4."

[[presets]]

id = "M3x3"

title = "M3 × 3"

params = { size = "M3", length = 3 }

aliases = ["DIN 913 M3x3", "ISO 4026 M3x3", "grub screw M3x3", "set screw M3x3", "M3 set screw", "DIN913 M3x3"]

standard = "DIN 913"

[[presets]]

id = "M3x4"

title = "M3 × 4"

params = { size = "M3", length = 4 }

aliases = ["DIN 913 M3x4", "ISO 4026 M3x4", "grub screw M3x4", "set screw M3x4", "M3 set screw", "DIN913 M3x4"]

standard = "DIN 913"

[[presets]]

id = "M3x5"

title = "M3 × 5"

params = { size = "M3", length = 5 }

aliases = ["DIN 913 M3x5", "ISO 4026 M3x5", "grub screw M3x5", "set screw M3x5", "M3 set screw", "DIN913 M3x5"]

standard = "DIN 913"

[[presets]]

id = "M3x6"

title = "M3 × 6"

params = { size = "M3", length = 6 }

aliases = ["DIN 913 M3x6", "ISO 4026 M3x6", "grub screw M3x6", "set screw M3x6"]

standard = "DIN 913"

[[presets]]

id = "M3x8"

title = "M3 × 8"

params = { size = "M3", length = 8 }

aliases = ["DIN 913 M3x8", "ISO 4026 M3x8", "grub screw M3x8", "set screw M3x8"]

standard = "DIN 913"

[[presets]]

id = "M3x10"

title = "M3 × 10"

params = { size = "M3", length = 10 }

aliases = ["DIN 913 M3x10", "ISO 4026 M3x10", "grub screw M3x10", "set screw M3x10"]

standard = "DIN 913"

[[presets]]

id = "M3x12"

title = "M3 × 12"

params = { size = "M3", length = 12 }

aliases = ["DIN 913 M3x12", "ISO 4026 M3x12", "grub screw M3x12", "set screw M3x12"]

standard = "DIN 913"

[[presets]]

id = "M3x16"

title = "M3 × 16"

params = { size = "M3", length = 16 }

aliases = ["DIN 913 M3x16", "ISO 4026 M3x16", "grub screw M3x16", "set screw M3x16"]

standard = "DIN 913"

[[presets]]

id = "M3x20"

title = "M3 × 20"

params = { size = "M3", length = 20 }

aliases = ["DIN 913 M3x20", "ISO 4026 M3x20", "grub screw M3x20", "set screw M3x20"]

standard = "DIN 913"

100

[[presets]]

101

id = "M4x4"

102

title = "M4 × 4"

103

params = { size = "M4", length = 4 }

104

aliases = ["DIN 913 M4x4", "ISO 4026 M4x4", "grub screw M4x4", "set screw M4x4"]

105

standard = "DIN 913"

106

107

[[presets]]

108

id = "M4x5"

109

title = "M4 × 5"

110

params = { size = "M4", length = 5 }

111

aliases = ["DIN 913 M4x5", "ISO 4026 M4x5", "grub screw M4x5", "set screw M4x5"]

112

standard = "DIN 913"

113

114

[[presets]]

115

id = "M4x6"

116

title = "M4 × 6"

117

params = { size = "M4", length = 6 }

118

aliases = ["DIN 913 M4x6", "ISO 4026 M4x6", "grub screw M4x6", "set screw M4x6"]

119

standard = "DIN 913"

120

121

[[presets]]

122

id = "M4x8"

123

title = "M4 × 8"

124

params = { size = "M4", length = 8 }

125

aliases = ["DIN 913 M4x8", "ISO 4026 M4x8", "grub screw M4x8", "set screw M4x8"]

126

standard = "DIN 913"

127

128

[[presets]]

129

id = "M4x10"

130

title = "M4 × 10"

131

params = { size = "M4", length = 10 }

132

aliases = ["DIN 913 M4x10", "ISO 4026 M4x10", "grub screw M4x10", "set screw M4x10"]

133

standard = "DIN 913"

134

135

[[presets]]

136

id = "M4x12"

137

title = "M4 × 12"

138

params = { size = "M4", length = 12 }

139

aliases = ["DIN 913 M4x12", "ISO 4026 M4x12", "grub screw M4x12", "set screw M4x12"]

140

standard = "DIN 913"

141

142

[[presets]]

143

id = "M4x16"

144

title = "M4 × 16"

145

params = { size = "M4", length = 16 }

146

aliases = ["DIN 913 M4x16", "ISO 4026 M4x16", "grub screw M4x16", "set screw M4x16"]

147

standard = "DIN 913"

148

149

[[presets]]

150

id = "M4x20"

151

title = "M4 × 20"

152

params = { size = "M4", length = 20 }

153

aliases = ["DIN 913 M4x20", "ISO 4026 M4x20", "grub screw M4x20", "set screw M4x20"]

154

standard = "DIN 913"

155

156

[[presets]]

157

id = "M5x5"

158

title = "M5 × 5"

159

params = { size = "M5", length = 5 }

160

aliases = ["DIN 913 M5x5", "ISO 4026 M5x5", "grub screw M5x5", "set screw M5x5"]

161

standard = "DIN 913"

162

163

[[presets]]

164

id = "M5x6"

165

title = "M5 × 6"

166

params = { size = "M5", length = 6 }

167

aliases = ["DIN 913 M5x6", "ISO 4026 M5x6", "grub screw M5x6", "set screw M5x6"]

168

standard = "DIN 913"

169

170

[[presets]]

171

id = "M5x8"

172

title = "M5 × 8"

173

params = { size = "M5", length = 8 }

174

aliases = ["DIN 913 M5x8", "ISO 4026 M5x8", "grub screw M5x8", "set screw M5x8"]

175

standard = "DIN 913"

176

177

[[presets]]

178

id = "M5x10"

179

title = "M5 × 10"

180

params = { size = "M5", length = 10 }

181

aliases = ["DIN 913 M5x10", "ISO 4026 M5x10", "grub screw M5x10", "set screw M5x10"]

182

standard = "DIN 913"

183

184

[[presets]]

185

id = "M5x12"

186

title = "M5 × 12"

187

params = { size = "M5", length = 12 }

188

aliases = ["DIN 913 M5x12", "ISO 4026 M5x12", "grub screw M5x12", "set screw M5x12"]

189

standard = "DIN 913"

190

191

[[presets]]

192

id = "M5x16"

193

title = "M5 × 16"

194

params = { size = "M5", length = 16 }

195

aliases = ["DIN 913 M5x16", "ISO 4026 M5x16", "grub screw M5x16", "set screw M5x16"]

196

standard = "DIN 913"

197

198

[[presets]]

199

id = "M5x20"

200

title = "M5 × 20"

201

params = { size = "M5", length = 20 }

202

aliases = ["DIN 913 M5x20", "ISO 4026 M5x20", "grub screw M5x20", "set screw M5x20"]

203

standard = "DIN 913"

204

205

[[presets]]

206

id = "M6x6"

207

title = "M6 × 6"

208

params = { size = "M6", length = 6 }

209

aliases = ["DIN 913 M6x6", "ISO 4026 M6x6", "grub screw M6x6", "set screw M6x6"]

210

standard = "DIN 913"

211

212

[[presets]]

213

id = "M6x8"

214

title = "M6 × 8"

215

params = { size = "M6", length = 8 }

216

aliases = ["DIN 913 M6x8", "ISO 4026 M6x8", "grub screw M6x8", "set screw M6x8"]

217

standard = "DIN 913"

218

219

[[presets]]

220

id = "M6x10"

221

title = "M6 × 10"

222

params = { size = "M6", length = 10 }

223

aliases = ["DIN 913 M6x10", "ISO 4026 M6x10", "grub screw M6x10", "set screw M6x10"]

224

standard = "DIN 913"

225

226

[[presets]]

227

id = "M6x12"

228

title = "M6 × 12"

229

params = { size = "M6", length = 12 }

230

aliases = ["DIN 913 M6x12", "ISO 4026 M6x12", "grub screw M6x12", "set screw M6x12"]

231

standard = "DIN 913"

232

233

[[presets]]

234

id = "M6x16"

235

title = "M6 × 16"

236

params = { size = "M6", length = 16 }

237

aliases = ["DIN 913 M6x16", "ISO 4026 M6x16", "grub screw M6x16", "set screw M6x16"]

238

standard = "DIN 913"

239

240

[[presets]]

241

id = "M6x20"

242

title = "M6 × 20"

243

params = { size = "M6", length = 20 }

244

aliases = ["DIN 913 M6x20", "ISO 4026 M6x20", "grub screw M6x20", "set screw M6x20"]

245

standard = "DIN 913"

246

name = "steve/set-screw"
version = "1.0.0"
runtime = "steve"
license = "MIT"
summary = "Hexagon socket set screw with flat point, ISO 4026 / DIN 913, M3 to M12, length from d, with catalogue sizes as presets."
description = """ISO 4026 (DIN 913) hexagon socket set screw with flat point (grub screw). Envelope geometry for \
assemblies: a plain cylinder at the nominal thread diameter, hexagon socket (s, t min) and a flat point (dp max, \
45° chamfer); the thread itself is not modelled.

The socket end is on the XY plane at the origin and the screw points along -Z; `length` is the overall length. \
Dimensions from ISO 4026:2003 Table 1 (see the README)."""
tags = ["fastener", "screw", "set-screw", "grub-screw", "iso-4026", "din-913", "metric"]

[parameters.size]
type = "choice"
default = "M5"
choices = ["M3", "M4", "M5", "M6", "M8", "M10", "M12"]
label = "Thread size"

[parameters.length]
type = "number"
default = 8
min = 2
max = 100
step = 1
unit = "mm"
label = "Length"
description = "Nominal length l, overall; at least d (ISO 4026 has no shorter screws)."

[parameters.material]
type = "choice"
default = "steel"
choices = ["steel", "stainless-a2", "stainless-a4"]
label = "Material"
description = "steel: property class 45H, black oxide; stainless-a2 / stainless-a4: ISO 3506-3 A2 / A4."

[[presets]]
id = "M3x3"
title = "M3 × 3"
params = { size = "M3", length = 3 }
aliases = ["DIN 913 M3x3", "ISO 4026 M3x3", "grub screw M3x3", "set screw M3x3", "M3 set screw", "DIN913 M3x3"]
standard = "DIN 913"

[[presets]]
id = "M3x4"
title = "M3 × 4"
params = { size = "M3", length = 4 }
aliases = ["DIN 913 M3x4", "ISO 4026 M3x4", "grub screw M3x4", "set screw M3x4", "M3 set screw", "DIN913 M3x4"]
standard = "DIN 913"

[[presets]]
id = "M3x5"
title = "M3 × 5"
params = { size = "M3", length = 5 }
aliases = ["DIN 913 M3x5", "ISO 4026 M3x5", "grub screw M3x5", "set screw M3x5", "M3 set screw", "DIN913 M3x5"]
standard = "DIN 913"

[[presets]]
id = "M3x6"
title = "M3 × 6"
params = { size = "M3", length = 6 }
aliases = ["DIN 913 M3x6", "ISO 4026 M3x6", "grub screw M3x6", "set screw M3x6"]
standard = "DIN 913"

[[presets]]
id = "M3x8"
title = "M3 × 8"
params = { size = "M3", length = 8 }
aliases = ["DIN 913 M3x8", "ISO 4026 M3x8", "grub screw M3x8", "set screw M3x8"]
standard = "DIN 913"

[[presets]]
id = "M3x10"
title = "M3 × 10"
params = { size = "M3", length = 10 }
aliases = ["DIN 913 M3x10", "ISO 4026 M3x10", "grub screw M3x10", "set screw M3x10"]
standard = "DIN 913"

[[presets]]
id = "M3x12"
title = "M3 × 12"
params = { size = "M3", length = 12 }
aliases = ["DIN 913 M3x12", "ISO 4026 M3x12", "grub screw M3x12", "set screw M3x12"]
standard = "DIN 913"

[[presets]]
id = "M3x16"
title = "M3 × 16"
params = { size = "M3", length = 16 }
aliases = ["DIN 913 M3x16", "ISO 4026 M3x16", "grub screw M3x16", "set screw M3x16"]
standard = "DIN 913"

[[presets]]
id = "M3x20"
title = "M3 × 20"
params = { size = "M3", length = 20 }
aliases = ["DIN 913 M3x20", "ISO 4026 M3x20", "grub screw M3x20", "set screw M3x20"]
standard = "DIN 913"

[[presets]]
id = "M4x4"
title = "M4 × 4"
params = { size = "M4", length = 4 }
aliases = ["DIN 913 M4x4", "ISO 4026 M4x4", "grub screw M4x4", "set screw M4x4"]
standard = "DIN 913"

[[presets]]
id = "M4x5"
title = "M4 × 5"
params = { size = "M4", length = 5 }
aliases = ["DIN 913 M4x5", "ISO 4026 M4x5", "grub screw M4x5", "set screw M4x5"]
standard = "DIN 913"

[[presets]]
id = "M4x6"
title = "M4 × 6"
params = { size = "M4", length = 6 }
aliases = ["DIN 913 M4x6", "ISO 4026 M4x6", "grub screw M4x6", "set screw M4x6"]
standard = "DIN 913"

[[presets]]
id = "M4x8"
title = "M4 × 8"
params = { size = "M4", length = 8 }
aliases = ["DIN 913 M4x8", "ISO 4026 M4x8", "grub screw M4x8", "set screw M4x8"]
standard = "DIN 913"

[[presets]]
id = "M4x10"
title = "M4 × 10"
params = { size = "M4", length = 10 }
aliases = ["DIN 913 M4x10", "ISO 4026 M4x10", "grub screw M4x10", "set screw M4x10"]
standard = "DIN 913"

[[presets]]
id = "M4x12"
title = "M4 × 12"
params = { size = "M4", length = 12 }
aliases = ["DIN 913 M4x12", "ISO 4026 M4x12", "grub screw M4x12", "set screw M4x12"]
standard = "DIN 913"

[[presets]]
id = "M4x16"
title = "M4 × 16"
params = { size = "M4", length = 16 }
aliases = ["DIN 913 M4x16", "ISO 4026 M4x16", "grub screw M4x16", "set screw M4x16"]
standard = "DIN 913"

[[presets]]
id = "M4x20"
title = "M4 × 20"
params = { size = "M4", length = 20 }
aliases = ["DIN 913 M4x20", "ISO 4026 M4x20", "grub screw M4x20", "set screw M4x20"]
standard = "DIN 913"

[[presets]]
id = "M5x5"
title = "M5 × 5"
params = { size = "M5", length = 5 }
aliases = ["DIN 913 M5x5", "ISO 4026 M5x5", "grub screw M5x5", "set screw M5x5"]
standard = "DIN 913"

[[presets]]
id = "M5x6"
title = "M5 × 6"
params = { size = "M5", length = 6 }
aliases = ["DIN 913 M5x6", "ISO 4026 M5x6", "grub screw M5x6", "set screw M5x6"]
standard = "DIN 913"

[[presets]]
id = "M5x8"
title = "M5 × 8"
params = { size = "M5", length = 8 }
aliases = ["DIN 913 M5x8", "ISO 4026 M5x8", "grub screw M5x8", "set screw M5x8"]
standard = "DIN 913"

[[presets]]
id = "M5x10"
title = "M5 × 10"
params = { size = "M5", length = 10 }
aliases = ["DIN 913 M5x10", "ISO 4026 M5x10", "grub screw M5x10", "set screw M5x10"]
standard = "DIN 913"

[[presets]]
id = "M5x12"
title = "M5 × 12"
params = { size = "M5", length = 12 }
aliases = ["DIN 913 M5x12", "ISO 4026 M5x12", "grub screw M5x12", "set screw M5x12"]
standard = "DIN 913"

[[presets]]
id = "M5x16"
title = "M5 × 16"
params = { size = "M5", length = 16 }
aliases = ["DIN 913 M5x16", "ISO 4026 M5x16", "grub screw M5x16", "set screw M5x16"]
standard = "DIN 913"

[[presets]]
id = "M5x20"
title = "M5 × 20"
params = { size = "M5", length = 20 }
aliases = ["DIN 913 M5x20", "ISO 4026 M5x20", "grub screw M5x20", "set screw M5x20"]
standard = "DIN 913"

[[presets]]
id = "M6x6"
title = "M6 × 6"
params = { size = "M6", length = 6 }
aliases = ["DIN 913 M6x6", "ISO 4026 M6x6", "grub screw M6x6", "set screw M6x6"]
standard = "DIN 913"

[[presets]]
id = "M6x8"
title = "M6 × 8"
params = { size = "M6", length = 8 }
aliases = ["DIN 913 M6x8", "ISO 4026 M6x8", "grub screw M6x8", "set screw M6x8"]
standard = "DIN 913"

[[presets]]
id = "M6x10"
title = "M6 × 10"
params = { size = "M6", length = 10 }
aliases = ["DIN 913 M6x10", "ISO 4026 M6x10", "grub screw M6x10", "set screw M6x10"]
standard = "DIN 913"

[[presets]]
id = "M6x12"
title = "M6 × 12"
params = { size = "M6", length = 12 }
aliases = ["DIN 913 M6x12", "ISO 4026 M6x12", "grub screw M6x12", "set screw M6x12"]
standard = "DIN 913"

[[presets]]
id = "M6x16"
title = "M6 × 16"
params = { size = "M6", length = 16 }
aliases = ["DIN 913 M6x16", "ISO 4026 M6x16", "grub screw M6x16", "set screw M6x16"]
standard = "DIN 913"

[[presets]]
id = "M6x20"
title = "M6 × 20"
params = { size = "M6", length = 20 }
aliases = ["DIN 913 M6x20", "ISO 4026 M6x20", "grub screw M6x20", "set screw M6x20"]
standard = "DIN 913"

README.md 52 lines · Markdown

Download

Set screw, flat point (ISO 4026 / DIN 913)

Hexagon socket set screw (grub screw) with flat point, metric coarse thread, M3 to M12, length l from d up. Presets cover the common catalogue sizes (M3 × 3, M5 × 8, ...).

Geometry

Envelope for assemblies:

plain cylinder at the nominal thread diameter d, overall length l (length); the thread is not modelled;
hexagon socket at one end, key size s (nominal), depth t min for the length (see below), flat bottom;
flat point of diameter dp max at the other end, chamfered at 45° from d.

The socket end is on the XY plane at the origin, the screw along -Z.

Parameters

Parameter	Meaning
`size`	Thread size, M3 to M12
`length`	Nominal length l, overall, mm; at least d
`material`	`steel` (property class 45H, black oxide), `stainless-a2`, `stainless-a4` (ISO 3506-3)

Source

ISO 4026:2003, Hexagon socket set screws with flat point, Table 1, p. 3: d, dp max, s (nominal), t min. Read from the official preview https://cdn.standards.iteh.ai/samples/36431/f53ced64ab1946679bd80f0a0e6cac63/ISO-4026-2003.pdf and checked against DIN EN ISO 4026:2004-05 on fasten.it ("reproduced by permission of DIN", https://fasten.it/en/Norms/Norm/DIN EN ISO 4026, short-length column). DIN 913 is the same screw. ISO 4026:2026 is now current; its change list (DIN Media, DIN EN ISO 4026:2026) adds M30, changes the dp tolerance for dp ≤ 1 mm and deletes the masses, so none of the values below changes.

The table gives two t min values: footnote d, for the lengths in the shaded cells, which for M3 to M12 are exactly l = d (the shortest length of each size); footnote e, for every longer length. The model uses the first for l = d and the second for l > d. There is no ISO 4026 screw shorter than d, so length must be at least d.

Size	dp max	s	t min (l = d)	t min (l > d)
M3	2.0	1.5	1.2	2.0
M4	2.5	2.0	1.5	2.5
M5	3.5	2.5	2.0	3.0
M6	4.0	3.0	2.0	3.5
M8	5.5	4.0	3.0	5.0
M10	7.0	5.0	4.0	6.0
M12	8.5	6.0	4.8	8.0

Corrected in this audit: the socket depths were not from the table (0.75, 1, 1.25, 1.5, 2, 2.5, 3 = s / 2); they are now the table's t min. The catalogue's screws shorter than d (M4 × 3, M5 × 3 and × 4, M6 × 3 to × 5) are not ISO 4026 sizes and have no preset.

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

# Set screw, flat point (ISO 4026 / DIN 913)

Hexagon socket set screw (grub screw) with flat point, metric coarse thread, M3 to M12, length l from d up. Presets cover

the common catalogue sizes (M3 × 3, M5 × 8, ...).

## Geometry

Envelope for assemblies:

- plain cylinder at the nominal thread diameter **d**, overall length **l** (`length`); the thread is not modelled;

- hexagon socket at one end, key size **s** (nominal), depth **t min** for the length (see below), flat bottom;

- flat point of diameter **dp max** at the other end, chamfered at 45° from d.

The socket end is on the XY plane at the origin, the screw along -Z.

## Parameters

| Parameter | Meaning |

|---|---|

| `size` | Thread size, M3 to M12 |

| `length` | Nominal length l, overall, mm; at least d |

| `material` | `steel` (property class 45H, black oxide), `stainless-a2`, `stainless-a4` (ISO 3506-3) |

## Source

ISO 4026:2003, *Hexagon socket set screws with flat point*, Table 1, p. 3: d, dp max, s (nominal), t min. Read from

the official preview <https://cdn.standards.iteh.ai/samples/36431/f53ced64ab1946679bd80f0a0e6cac63/ISO-4026-2003.pdf>

and checked against DIN EN ISO 4026:2004-05 on fasten.it ("reproduced by permission of DIN",

<https://fasten.it/en/Norms/Norm/DIN%20EN%20ISO%204026>, short-length column). DIN 913 is the same screw.

ISO 4026:2026 is now current; its change list (DIN Media, DIN EN ISO 4026:2026) adds M30, changes the dp tolerance

for dp ≤ 1 mm and deletes the masses, so none of the values below changes.

The table gives two t min values: footnote d, for the lengths in the shaded cells, which for M3 to M12 are exactly

l = d (the shortest length of each size); footnote e, for every longer length. The model uses the first for l = d and

the second for l > d. There is no ISO 4026 screw shorter than d, so `length` must be at least d.

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

| M3 | 2.0 | 1.5 | 1.2 | 2.0 |

| M4 | 2.5 | 2.0 | 1.5 | 2.5 |

| M5 | 3.5 | 2.5 | 2.0 | 3.0 |

| M6 | 4.0 | 3.0 | 2.0 | 3.5 |

| M8 | 5.5 | 4.0 | 3.0 | 5.0 |

| M10 | 7.0 | 5.0 | 4.0 | 6.0 |

| M12 | 8.5 | 6.0 | 4.8 | 8.0 |

Corrected in this audit: the socket depths were not from the table (0.75, 1, 1.25, 1.5, 2, 2.5, 3 = s / 2); they are

now the table's t min. The catalogue's screws shorter than d (M4 × 3, M5 × 3 and × 4, M6 × 3 to × 5) are not ISO 4026

sizes and have no preset.

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

# Set screw, flat point (ISO 4026 / DIN 913)

Hexagon socket set screw (grub screw) with flat point, metric coarse thread, M3 to M12, length l from d up. Presets cover
the common catalogue sizes (M3 × 3, M5 × 8, ...).

## Geometry

Envelope for assemblies:

- plain cylinder at the nominal thread diameter **d**, overall length **l** (`length`); the thread is not modelled;
- hexagon socket at one end, key size **s** (nominal), depth **t min** for the length (see below), flat bottom;
- flat point of diameter **dp max** at the other end, chamfered at 45° from d.

The socket end is on the XY plane at the origin, the screw along -Z.

## Parameters

| Parameter | Meaning |
|---|---|
| `size` | Thread size, M3 to M12 |
| `length` | Nominal length l, overall, mm; at least d |
| `material` | `steel` (property class 45H, black oxide), `stainless-a2`, `stainless-a4` (ISO 3506-3) |

## Source

ISO 4026:2003, *Hexagon socket set screws with flat point*, Table 1, p. 3: d, dp max, s (nominal), t min. Read from
the official preview <https://cdn.standards.iteh.ai/samples/36431/f53ced64ab1946679bd80f0a0e6cac63/ISO-4026-2003.pdf>
and checked against DIN EN ISO 4026:2004-05 on fasten.it ("reproduced by permission of DIN",
<https://fasten.it/en/Norms/Norm/DIN%20EN%20ISO%204026>, short-length column). DIN 913 is the same screw.
ISO 4026:2026 is now current; its change list (DIN Media, DIN EN ISO 4026:2026) adds M30, changes the dp tolerance
for dp ≤ 1 mm and deletes the masses, so none of the values below changes.

The table gives two t min values: footnote d, for the lengths in the shaded cells, which for M3 to M12 are exactly
l = d (the shortest length of each size); footnote e, for every longer length. The model uses the first for l = d and
the second for l > d. There is no ISO 4026 screw shorter than d, so `length` must be at least d.

| Size | dp max | s | t min (l = d) | t min (l > d) |
|---|---|---|---|---|
| M3 | 2.0 | 1.5 | 1.2 | 2.0 |
| M4 | 2.5 | 2.0 | 1.5 | 2.5 |
| M5 | 3.5 | 2.5 | 2.0 | 3.0 |
| M6 | 4.0 | 3.0 | 2.0 | 3.5 |
| M8 | 5.5 | 4.0 | 3.0 | 5.0 |
| M10 | 7.0 | 5.0 | 4.0 | 6.0 |
| M12 | 8.5 | 6.0 | 4.8 | 8.0 |

Corrected in this audit: the socket depths were not from the table (0.75, 1, 1.25, 1.5, 2, 2.5, 3 = s / 2); they are
now the table's t min. The catalogue's screws shorter than d (M4 × 3, M5 × 3 and × 4, M6 × 3 to × 5) are not ISO 4026
sizes and have no preset.

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

Use this part

STEVE

Open in STEVE

Open it in STEVE The STEVE runtime runs in STEVE: open the part there, or download the code and bundle.

Get the code

curl -o part.py "https://pythonparts.org/p/steve/set-screw/v/1.0.0/raw/part.py"

Raw files, bundle and API

part.py
pypart.toml
README.md
bundle.tar.gzthe package, as published

curl "https://pythonparts.org/api/v1/parts/steve/set-screw/1.0.0"

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: 1.08 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: 4ceef4460d0b…

#fastener #screw #set-screw #grub-screw #iso-4026 #din-913 #metric

Checks

PassedImports: steve

Every published part passes our checks before it’s listed. It is still code: read it before you use it.

Request a removal A copyright notice, or a trademark, confidential design, safety, malicious code or other problem. Report an illegal or prohibited item

ISO 4026 (DIN 913) hexagon socket set screw with flat point (grub screw). Envelope geometry for assemblies: a plain cylinder at the nominal thread diameter, hexagon socket (s, t min) and a flat point (dp max, 45° chamfer); the thread itself is not modelled. The socket end is on the XY plane at the origin and the screw points along -Z; `length` is the overall length. Dimensions from ISO 4026:2003 Table 1 (see the README).

Set screw, flat point (ISO 4026 / DIN 913)

Hexagon socket set screw (grub screw) with flat point, metric coarse thread, M3 to M12, length l from d up. Presets cover the common catalogue sizes (M3 × 3, M5 × 8, ...).

Geometry

Envelope for assemblies:

plain cylinder at the nominal thread diameter d, overall length l (length); the thread is not modelled;
hexagon socket at one end, key size s (nominal), depth t min for the length (see below), flat bottom;
flat point of diameter dp max at the other end, chamfered at 45° from d.

The socket end is on the XY plane at the origin, the screw along -Z.

Parameters

Parameter	Meaning
`size`	Thread size, M3 to M12
`length`	Nominal length l, overall, mm; at least d
`material`	`steel` (property class 45H, black oxide), `stainless-a2`, `stainless-a4` (ISO 3506-3)

Source

Size	dp max	s	t min (l = d)	t min (l > d)
M3	2.0	1.5	1.2	2.0
M4	2.5	2.0	1.5	2.5
M5	3.5	2.5	2.0	3.0
M6	4.0	3.0	2.0	3.5
M8	5.5	4.0	3.0	5.0
M10	7.0	5.0	4.0	6.0
M12	8.5	6.0	4.8	8.0

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

1.0.0 Latest Nov 1, 2026 · 1 day ago

More #fastener

STEVEMIT

steve/inch-set-screw

Socket set screw, inch, ASME B18.3, #0 to 1/2 in, UNC/UNF, with catalogue sizes as presets.

0 73 sizes 0 1 day ago v1.0.0

STEVEMIT

steve/hex-head-screw

Hexagon head screw, fully threaded, ISO 4017 / DIN 933, M1.6 to M36, any length, with catalogue sizes as presets.

18 85 sizes 0 1 day ago v2.0.0

STEVEMIT

steve/button-head-screw

Hexagon socket button head screw, ISO 7380-1, M3 to M16, any length, with catalogue sizes as presets.

10 65 sizes 0 1 day ago v2.0.0

STEVEMIT

steve/countersunk-screw

Hexagon socket countersunk head screw, ISO 10642 / DIN 7991, M3 to M12, any length, with catalogue sizes as presets.

0 62 sizes 0 1 day ago v2.0.0

Size	dp max	s	t min (l = d)	t min (l > d)
M3	2.0	1.5	1.2	2.0
M4	2.5	2.0	1.5	2.5
M5	3.5	2.5	2.0	3.0
M6	4.0	3.0	2.0	3.5
M8	5.5	4.0	3.0	5.0
M10	7.0	5.0	4.0	6.0
M12	8.5	6.0	4.8	8.0

Size	dp max	s	t min (l = d)	t min (l > d)
M3	2.0	1.5	1.2	2.0
M4	2.5	2.0	1.5	2.5
M5	3.5	2.5	2.0	3.0
M6	4.0	3.0	2.0	3.5
M8	5.5	4.0	3.0	5.0
M10	7.0	5.0	4.0	6.0
M12	8.5	6.0	4.8	8.0

Size	dp max	s	t min (l = d)	t min (l > d)
M3	2.0	1.5	1.2	2.0
M4	2.5	2.0	1.5	2.5
M5	3.5	2.5	2.0	3.0
M6	4.0	3.0	2.0	3.5
M8	5.5	4.0	3.0	5.0
M10	7.0	5.0	4.0	6.0
M12	8.5	6.0	4.8	8.0

Size	dp max	s	t min (l = d)	t min (l > d)
M3	2.0	1.5	1.2	2.0
M4	2.5	2.0	1.5	2.5
M5	3.5	2.5	2.0	3.0
M6	4.0	3.0	2.0	3.5
M8	5.5	4.0	3.0	5.0
M10	7.0	5.0	4.0	6.0
M12	8.5	6.0	4.8	8.0

steve/set-screw

Set screw, flat point (ISO 4026 / DIN 913)

Geometry

Parameters

Source

Set screw, flat point (ISO 4026 / DIN 913)

Geometry

Parameters

Source

Related parts

steve/inch-set-screw

steve/hex-head-screw

steve/button-head-screw

steve/countersunk-screw

Size	dp max	s	t min (l = d)	t min (l > d)
M3	2.0	1.5	1.2	2.0
M4	2.5	2.0	1.5	2.5
M5	3.5	2.5	2.0	3.0
M6	4.0	3.0	2.0	3.5
M8	5.5	4.0	3.0	5.0
M10	7.0	5.0	4.0	6.0
M12	8.5	6.0	4.8	8.0

Size	dp max	s	t min (l = d)	t min (l > d)
M3	2.0	1.5	1.2	2.0
M4	2.5	2.0	1.5	2.5
M5	3.5	2.5	2.0	3.0
M6	4.0	3.0	2.0	3.5
M8	5.5	4.0	3.0	5.0
M10	7.0	5.0	4.0	6.0
M12	8.5	6.0	4.8	8.0