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		@@ -1,30 +1,96 @@
1		-"""ISO 7089 plain washer, normal series. It sits on the XY plane, centred on the origin.
	1	+"""Metric plain (flat) washer: normal series ISO 7089 (DIN 125-A), product grade C ISO 7091 (DIN 126), small series
	2	+ISO 7092 (DIN 433; M1 to M1.4 from DIN 433), large series ISO 7093-1 and DIN 9021, square-hole DIN 440 form V, heavy DIN 7349.
2	3
3		-Material: 200 HV steel (cold-rolled DC01), zinc plated."""
	4	+A flat ring: hole d1 (min, nominal), outside diameter d2 (max, nominal) and thickness h (nominal). DIN 440 form V
	5	+has a square hole of side a. The washer lies on the XY plane at the origin, its thickness along +Z.
	6	+"""
4	7	from steve import Model
5	8
	9	+standard = "ISO 7089" # Standard
6	10	size = "M3" # Thread size
	11	+material = "steel" # Material
7	12
8		-# size: (inner diameter d1, outer diameter d2, thickness h)
9		-WASHERS = {
10		- 'M2': (2.2, 5.0, 0.3),
11		- 'M2.5': (2.7, 6.0, 0.5),
12		- 'M3': (3.2, 7.0, 0.5),
13		- 'M4': (4.3, 9.0, 0.8),
14		- 'M5': (5.3, 10.0, 1.0),
15		- 'M6': (6.4, 12.0, 1.6),
16		- 'M8': (8.4, 16.0, 1.6),
17		- 'M10': (10.5, 20.0, 2.0),
18		- 'M12': (13.0, 24.0, 2.5),
	13	+# size: (d1, d2, h) in mm; d1 = hole (min = nominal), d2 = outside diameter (max = nominal), h = nominal thickness
	14	+# ISO 7089:2000 Table 1 (and non-preferred sizes); DIN 125-1 form A has the same dimensions.
	15	+# DIN EN ISO 7089:2000-11, https://fasten.it/norms/norm/din_en_iso_7089; https://www.fasteners.eu/standards/ISO/7089/
	16	+ISO_7089 = {
	17	+ "M1.6": (1.7, 4.0, 0.3), "M2": (2.2, 5.0, 0.3), "M2.5": (2.7, 6.0, 0.5), "M3": (3.2, 7.0, 0.5),
	18	+ "M3.5": (3.7, 8.0, 0.5), "M4": (4.3, 9.0, 0.8), "M5": (5.3, 10.0, 1.0), "M6": (6.4, 12.0, 1.6),
	19	+ "M8": (8.4, 16.0, 1.6), "M10": (10.5, 20.0, 2.0), "M12": (13.0, 24.0, 2.5), "M14": (15.0, 28.0, 2.5),
	20	+ "M16": (17.0, 30.0, 3.0), "M18": (19.0, 34.0, 3.0), "M20": (21.0, 37.0, 3.0), "M22": (23.0, 39.0, 3.0),
	21	+ "M24": (25.0, 44.0, 4.0), "M27": (28.0, 50.0, 4.0), "M30": (31.0, 56.0, 4.0), "M33": (34.0, 60.0, 5.0),
	22	+ "M36": (37.0, 66.0, 5.0),
19	23	}
20		-d1, d2, h = WASHERS[size]
	24	+# ISO 7091:2000 Table 1 (product grade C); DIN 126 has the same dimensions.
	25	+# DIN EN ISO 7091:2000-11, https://fasten.it/norms/norm/din_en_iso_7091; https://www.fasteners.eu/standards/ISO/7091/
	26	+ISO_7091 = {
	27	+ "M1.6": (1.8, 4.0, 0.3), "M2": (2.4, 5.0, 0.3), "M2.5": (2.9, 6.0, 0.5), "M3": (3.4, 7.0, 0.5),
	28	+ "M4": (4.5, 9.0, 0.8), "M5": (5.5, 10.0, 1.0), "M6": (6.6, 12.0, 1.6), "M8": (9.0, 16.0, 1.6),
	29	+ "M10": (11.0, 20.0, 2.0), "M12": (13.5, 24.0, 2.5), "M16": (17.5, 30.0, 3.0), "M20": (22.0, 37.0, 3.0),
	30	+ "M24": (26.0, 44.0, 4.0), "M30": (33.0, 56.0, 4.0), "M36": (39.0, 66.0, 5.0), "M42": (45.0, 78.0, 8.0),
	31	+ "M48": (52.0, 92.0, 8.0), "M56": (62.0, 105.0, 10.0), "M64": (70.0, 115.0, 10.0),
	32	+}
	33	+# ISO 7092:2000 Table 1 (small series, M1.6 to M36); DIN 433-1 has the same dimensions.
	34	+# DIN EN ISO 7092:2000-11, https://fasten.it/norms/norm/din_en_iso_7092; M36 d2 60 also https://www.jcfasteners.com/wp-content/uploads/ISO-7092-Small-OD-Washer-B6iD10-SS316.pdf
	35	+ISO_7092 = {
	36	+ "M1.6": (1.7, 3.5, 0.3),
	37	+ "M2": (2.2, 4.5, 0.3), "M2.5": (2.7, 5.0, 0.5), "M3": (3.2, 6.0, 0.5), "M3.5": (3.7, 7.0, 0.5),
	38	+ "M4": (4.3, 8.0, 0.5), "M5": (5.3, 9.0, 1.0), "M6": (6.4, 11.0, 1.6), "M8": (8.4, 15.0, 1.6),
	39	+ "M10": (10.5, 18.0, 1.6), "M12": (13.0, 20.0, 2.0), "M14": (15.0, 24.0, 2.5), "M16": (17.0, 28.0, 2.5),
	40	+ "M18": (19.0, 30.0, 2.5), "M20": (21.0, 34.0, 3.0), "M24": (25.0, 39.0, 4.0), "M30": (31.0, 50.0, 4.0),
	41	+ "M36": (37.0, 60.0, 5.0),
	42	+}
	43	+# ISO 7093-1:2000 Table 1 (large series, product grade A). DIN EN ISO 7093-1:2000-11, https://fasten.it/norms/norm/din_en_iso_7093-1
	44	+ISO_7093 = {
	45	+ "M3": (3.2, 9.0, 0.8), "M3.5": (3.7, 11.0, 0.8), "M4": (4.3, 12.0, 1.0), "M5": (5.3, 15.0, 1.0),
	46	+ "M6": (6.4, 18.0, 1.6), "M8": (8.4, 24.0, 2.0), "M10": (10.5, 30.0, 2.5), "M12": (13.0, 37.0, 3.0),
	47	+ "M14": (15.0, 44.0, 3.0), "M16": (17.0, 50.0, 3.0), "M18": (19.0, 56.0, 4.0), "M20": (21.0, 60.0, 4.0),
	48	+ "M22": (23.0, 66.0, 5.0), "M24": (25.0, 72.0, 5.0), "M27": (30.0, 85.0, 6.0), "M30": (33.0, 92.0, 6.0),
	49	+ "M33": (36.0, 105.0, 6.0), "M36": (39.0, 110.0, 8.0),
	50	+}
	51	+# DIN 9021:1990-03 table (https://fasten.it/norms/norm/din_9021; https://www.fasteners.eu/standards/DIN/9021/) (outside diameter about 3 d); only the sizes ISO 7093-1 doesn't have.
	52	+DIN_9021 = {
	53	+ "M2.5": (2.7, 8.0, 0.8), "M7": (7.4, 22.0, 2.0),
	54	+}
	55	+# DIN 440:2001-03 form V (https://fasten.it/norms/norm/din_440, table 0) (square hole, for carriage bolts): (square hole a min, d2 max, nominal h = mid of h min / max)
	56	+DIN_440_V = {
	57	+ "M5": (5.5, 18.0, 2.0), "M6": (6.6, 22.0, 2.0), "M8": (9.0, 28.0, 3.0), "M10": (11.0, 34.0, 3.0),
	58	+ "M12": (14.0, 44.0, 4.0), "M16": (18.0, 56.0, 5.0), "M20": (22.0, 72.0, 6.0), "M22": (24.0, 80.0, 6.0),
	59	+}
	60	+# DIN 433-1:1990-03 table: the sizes below M1.6 that ISO 7092 doesn't have (https://fasten.it/norms/norm/din_433).
	61	+DIN_433 = {
	62	+ "M1": (1.1, 2.5, 0.3), "M1.2": (1.3, 3.0, 0.3), "M1.4": (1.5, 3.0, 0.3),
	63	+}
	64	+# DIN 7349:2009-08 table (washers for bolts with heavy clamping sleeves; https://fasten.it/norms/norm/din_7349, https://www.fasteners.eu/standards/DIN/7349/).
	65	+DIN_7349 = {
	66	+ "M3": (3.2, 9.0, 1.0), "M4": (4.3, 12.0, 1.6), "M5": (5.3, 15.0, 2.0), "M6": (6.4, 17.0, 3.0),
	67	+ "M8": (8.4, 21.0, 4.0), "M10": (10.5, 25.0, 4.0), "M12": (13.0, 30.0, 6.0), "M14": (15.0, 36.0, 6.0),
	68	+ "M16": (17.0, 40.0, 6.0), "M18": (19.0, 44.0, 8.0), "M20": (21.0, 44.0, 8.0), "M22": (23.0, 50.0, 8.0),
	69	+ "M24": (25.0, 50.0, 10.0), "M27": (28.0, 60.0, 10.0), "M30": (31.0, 68.0, 10.0),
	70	+}
	71	+STANDARDS = {"ISO 7089": ISO_7089, "ISO 7091": ISO_7091, "ISO 7092": ISO_7092, "ISO 7093-1": ISO_7093,
	72	+ "DIN 9021": DIN_9021, "DIN 433": DIN_433, "DIN 440 V": DIN_440_V, "DIN 7349": DIN_7349}
	73	+# material choice: (STEVE material library id, appearance colour)
	74	+MATERIALS = {
	75	+ "steel": ("steel-generic", "#b9bdc2"), # 200 HV / 300 HV, zinc plated
	76	+ "stainless-a2": ("stainless-304", "#c9ccd0"), # A2
	77	+ "stainless-a4": ("stainless-316", "#c9ccd0"), # A4
	78	+}
	79	+
	80	+table = STANDARDS[standard]
	81	+if size not in table:
	82	+ raise ValueError(f"{standard} has no size {size}; sizes: {', '.join(table)}")
	83	+d1, d2, h = table[size]
	84	+material_id, colour = MATERIALS[material]
21	85
22	86	model = Model()
23	87	with model.sketch("washer_sketch", on="XY", name="Washer") as sk:
24		- sk.circle("outer", (0, 0), d2 / 2)
25		- sk.circle("inner", (0, 0), d1 / 2)
26		-model.extrude("washer", "washer_sketch", distance=h)
27		-model.material("steel-dc01") # 200 HV washer steel
28		-model.appearance(color="#c9d1d9", metalness=1.0, roughness=0.3) # clear zinc plating
	88	+ sk.circle("outside", (0, 0), d2 / 2)
	89	+ if standard == "DIN 440 V":
	90	+ sk.center_rect("hole", (0, 0), d1, d1)
	91	+ else:
	92	+ sk.circle("hole", (0, 0), d1 / 2)
	93	+model.extrude("washer", "washer_sketch", distance=h, name="Washer")
	94	+model.material(material_id, color=colour)
29	95	result = model.result()
30	96

pypart.toml +24 −6

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		@@ -1,15 +1,33 @@
1	1	name = "steve/flat-washer"
2		-version = "1.1.0"
	2	+version = "2.0.0"
3	3	runtime = "steve"
4	4	license = "MIT"
5		-summary = "Plain washer, ISO 7089, M2 to M12."
6		-description = "ISO 7089 plain washer, normal series. It sits on the XY plane, centred on the origin.\n\nMaterial: 200 HV steel (cold-rolled DC01), zinc plated.\n\nDimensions from STEVE's standard-part tables (nominal values of the standard). Envelope geometry: no modelled thread."
7		-tags = ["fastener", "washer", "iso-7089", "metric"]
8		-changes = "Materials and finishes: each part is made of its standard's engineering material, with its usual finish."
	5	+summary = "Metric flat washers: ISO 7089 / DIN 125, ISO 7091, ISO 7092, ISO 7093-1, DIN 9021, DIN 433, DIN 440 V, DIN 7349."
	6	+description = """Metric plain washers in seven standard series (normal, product grade C, small, large, square-hole \
	7	+and heavy), with catalogue sizes as presets. A flat ring: nominal hole d1, outside diameter d2 and thickness h of the \
	8	+standard's table (DIN 440 form V: a square hole).
	9	+
	10	+The washer lies on the XY plane at the origin, its thickness along +Z. See the README for the tables and their \
	11	+sources."""
	12	+tags = ["fastener", "washer", "flat-washer", "iso-7089", "din-125", "iso-7092", "iso-7093", "din-440", "metric"]
	13	+
	14	+[parameters.standard]
	15	+type = "choice"
	16	+default = "ISO 7089"
	17	+choices = ["ISO 7089", "ISO 7091", "ISO 7092", "ISO 7093-1", "DIN 9021", "DIN 433", "DIN 440 V", "DIN 7349"]
	18	+label = "Standard"
	19	+description = "ISO 7089 = DIN 125-A (normal), ISO 7091 = DIN 126 (grade C), ISO 7092 = DIN 433 (small; DIN 433 for M1 to M1.4), ISO 7093-1 / DIN 9021 (large), DIN 440 V (square hole), DIN 7349 (heavy)."
9	20
10	21	[parameters.size]
11	22	type = "choice"
12	23	default = "M3"
13		-choices = ["M2", "M2.5", "M3", "M4", "M5", "M6", "M8", "M10", "M12"]
	24	+choices = ["M1", "M1.2", "M1.4", "M1.6", "M2", "M2.5", "M3", "M3.5", "M4", "M5", "M6", "M7", "M8", "M10", "M12", "M14", "M16", "M18", "M20", "M22", "M24", "M27", "M30", "M33", "M36", "M42", "M48", "M56", "M64"]
14	25	label = "Thread size"
	26	+description = "The bolt size the washer is for. Not every standard has every size: the README lists them."
15	27
	28	+[parameters.material]
	29	+type = "choice"
	30	+default = "steel"
	31	+choices = ["steel", "stainless-a2", "stainless-a4"]
	32	+label = "Material"
	33	+

presets.toml added in 2.0.0

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		@@ -1,0 +1,583 @@
	1	+# Presets of this part (factory/PRESETS.md). Written by factory/gen.py.
	2	+
	3	+[[presets]]
	4	+id = "ISO7089-M2"
	5	+title = "Flat washer M2 (ISO 7089)"
	6	+params = { standard = "ISO 7089", size = "M2" }
	7	+aliases = ["ISO 7089 M2", "DIN 125 M2", "DIN 125-A M2", "M2"]
	8	+standard = "ISO 7089"
	9	+
	10	+[[presets]]
	11	+id = "ISO7089-M2.5"
	12	+title = "Flat washer M2.5 (ISO 7089)"
	13	+params = { standard = "ISO 7089", size = "M2.5" }
	14	+aliases = ["ISO 7089 M2.5", "DIN 125 M2.5", "DIN 125-A M2.5", "M2.5"]
	15	+standard = "ISO 7089"
	16	+
	17	+[[presets]]
	18	+id = "ISO7089-M3"
	19	+title = "Flat washer M3 (ISO 7089)"
	20	+params = { standard = "ISO 7089", size = "M3" }
	21	+aliases = ["ISO 7089 M3", "DIN 125 M3", "DIN 125-A M3", "M3 flat washer", "DIN125 M3", "Flat washer M3 (ISO 7089)", "M3"]
	22	+standard = "ISO 7089"
	23	+
	24	+[[presets]]
	25	+id = "ISO7089-M4"
	26	+title = "Flat washer M4 (ISO 7089)"
	27	+params = { standard = "ISO 7089", size = "M4" }
	28	+aliases = ["ISO 7089 M4", "DIN 125 M4", "DIN 125-A M4", "M4"]
	29	+standard = "ISO 7089"
	30	+
	31	+[[presets]]
	32	+id = "ISO7089-M5"
	33	+title = "Flat washer M5 (ISO 7089)"
	34	+params = { standard = "ISO 7089", size = "M5" }
	35	+aliases = ["ISO 7089 M5", "DIN 125 M5", "DIN 125-A M5", "M5"]
	36	+standard = "ISO 7089"
	37	+
	38	+[[presets]]
	39	+id = "ISO7089-M6"
	40	+title = "Flat washer M6 (ISO 7089)"
	41	+params = { standard = "ISO 7089", size = "M6" }
	42	+aliases = ["ISO 7089 M6", "DIN 125 M6", "DIN 125-A M6", "M6"]
	43	+standard = "ISO 7089"
	44	+
	45	+[[presets]]
	46	+id = "ISO7089-M8"
	47	+title = "Flat washer M8 (ISO 7089)"
	48	+params = { standard = "ISO 7089", size = "M8" }
	49	+aliases = ["ISO 7089 M8", "DIN 125 M8", "DIN 125-A M8", "M8 flat washer", "DIN125 M8", "Flat washer M8 (ISO 7089)", "M8"]
	50	+standard = "ISO 7089"
	51	+
	52	+[[presets]]
	53	+id = "ISO7089-M10"
	54	+title = "Flat washer M10 (ISO 7089)"
	55	+params = { standard = "ISO 7089", size = "M10" }
	56	+aliases = ["ISO 7089 M10", "DIN 125 M10", "DIN 125-A M10", "M10 flat washer", "DIN125 M10"]
	57	+standard = "ISO 7089"
	58	+
	59	+[[presets]]
	60	+id = "ISO7091-M1.6"
	61	+title = "Flat washer, grade C M1.6 (ISO 7091)"
	62	+params = { standard = "ISO 7091", size = "M1.6" }
	63	+aliases = ["ISO 7091 M1.6", "DIN 126 M1.6", "ISO7091 M1.6", "M1.6 washer"]
	64	+standard = "ISO 7091"
	65	+
	66	+[[presets]]
	67	+id = "ISO7091-M2"
	68	+title = "Flat washer, grade C M2 (ISO 7091)"
	69	+params = { standard = "ISO 7091", size = "M2" }
	70	+aliases = ["ISO 7091 M2", "DIN 126 M2", "ISO7091 M2", "M2 washer"]
	71	+standard = "ISO 7091"
	72	+
	73	+[[presets]]
	74	+id = "ISO7091-M2.5"
	75	+title = "Flat washer, grade C M2.5 (ISO 7091)"
	76	+params = { standard = "ISO 7091", size = "M2.5" }
	77	+aliases = ["ISO 7091 M2.5", "DIN 126 M2.5", "ISO7091 M2.5", "M2.5 washer"]
	78	+standard = "ISO 7091"
	79	+
	80	+[[presets]]
	81	+id = "ISO7091-M3"
	82	+title = "Flat washer, grade C M3 (ISO 7091)"
	83	+params = { standard = "ISO 7091", size = "M3" }
	84	+aliases = ["ISO 7091 M3", "DIN 126 M3", "ISO7091 M3", "M3 washer"]
	85	+standard = "ISO 7091"
	86	+
	87	+[[presets]]
	88	+id = "ISO7091-M4"
	89	+title = "Flat washer, grade C M4 (ISO 7091)"
	90	+params = { standard = "ISO 7091", size = "M4" }
	91	+aliases = ["ISO 7091 M4", "DIN 126 M4", "ISO7091 M4", "M4 washer"]
	92	+standard = "ISO 7091"
	93	+
	94	+[[presets]]
	95	+id = "ISO7091-M5"
	96	+title = "Flat washer, grade C M5 (ISO 7091)"
	97	+params = { standard = "ISO 7091", size = "M5" }
	98	+aliases = ["ISO 7091 M5", "DIN 126 M5", "ISO7091 M5", "M5 washer"]
	99	+standard = "ISO 7091"
	100	+
	101	+[[presets]]
	102	+id = "ISO7091-M6"
	103	+title = "Flat washer, grade C M6 (ISO 7091)"
	104	+params = { standard = "ISO 7091", size = "M6" }
	105	+aliases = ["ISO 7091 M6", "DIN 126 M6", "ISO7091 M6", "M6 washer"]
	106	+standard = "ISO 7091"
	107	+
	108	+[[presets]]
	109	+id = "ISO7091-M8"
	110	+title = "Flat washer, grade C M8 (ISO 7091)"
	111	+params = { standard = "ISO 7091", size = "M8" }
	112	+aliases = ["ISO 7091 M8", "DIN 126 M8", "ISO7091 M8", "M8 washer"]
	113	+standard = "ISO 7091"
	114	+
	115	+[[presets]]
	116	+id = "ISO7091-M10"
	117	+title = "Flat washer, grade C M10 (ISO 7091)"
	118	+params = { standard = "ISO 7091", size = "M10" }
	119	+aliases = ["ISO 7091 M10", "DIN 126 M10", "ISO7091 M10", "M10 washer"]
	120	+standard = "ISO 7091"
	121	+
	122	+[[presets]]
	123	+id = "ISO7091-M12"
	124	+title = "Flat washer, grade C M12 (ISO 7091)"
	125	+params = { standard = "ISO 7091", size = "M12" }
	126	+aliases = ["ISO 7091 M12", "DIN 126 M12", "ISO7091 M12", "M12 washer"]
	127	+standard = "ISO 7091"
	128	+
	129	+[[presets]]
	130	+id = "ISO7091-M16"
	131	+title = "Flat washer, grade C M16 (ISO 7091)"
	132	+params = { standard = "ISO 7091", size = "M16" }
	133	+aliases = ["ISO 7091 M16", "DIN 126 M16", "ISO7091 M16", "M16 washer"]
	134	+standard = "ISO 7091"
	135	+
	136	+[[presets]]
	137	+id = "ISO7091-M20"
	138	+title = "Flat washer, grade C M20 (ISO 7091)"
	139	+params = { standard = "ISO 7091", size = "M20" }
	140	+aliases = ["ISO 7091 M20", "DIN 126 M20", "ISO7091 M20", "M20 washer"]
	141	+standard = "ISO 7091"
	142	+
	143	+[[presets]]
	144	+id = "ISO7091-M24"
	145	+title = "Flat washer, grade C M24 (ISO 7091)"
	146	+params = { standard = "ISO 7091", size = "M24" }
	147	+aliases = ["ISO 7091 M24", "DIN 126 M24", "ISO7091 M24", "M24 washer"]
	148	+standard = "ISO 7091"
	149	+
	150	+[[presets]]
	151	+id = "ISO7091-M30"
	152	+title = "Flat washer, grade C M30 (ISO 7091)"
	153	+params = { standard = "ISO 7091", size = "M30" }
	154	+aliases = ["ISO 7091 M30", "DIN 126 M30", "ISO7091 M30", "M30 washer"]
	155	+standard = "ISO 7091"
	156	+
	157	+[[presets]]
	158	+id = "ISO7091-M36"
	159	+title = "Flat washer, grade C M36 (ISO 7091)"
	160	+params = { standard = "ISO 7091", size = "M36" }
	161	+aliases = ["ISO 7091 M36", "DIN 126 M36", "ISO7091 M36", "M36 washer"]
	162	+standard = "ISO 7091"
	163	+
	164	+[[presets]]
	165	+id = "ISO7091-M42"
	166	+title = "Flat washer, grade C M42 (ISO 7091)"
	167	+params = { standard = "ISO 7091", size = "M42" }
	168	+aliases = ["ISO 7091 M42", "DIN 126 M42", "ISO7091 M42", "M42 washer"]
	169	+standard = "ISO 7091"
	170	+
	171	+[[presets]]
	172	+id = "ISO7091-M48"
	173	+title = "Flat washer, grade C M48 (ISO 7091)"
	174	+params = { standard = "ISO 7091", size = "M48" }
	175	+aliases = ["ISO 7091 M48", "DIN 126 M48", "ISO7091 M48", "M48 washer"]
	176	+standard = "ISO 7091"
	177	+
	178	+[[presets]]
	179	+id = "ISO7091-M56"
	180	+title = "Flat washer, grade C M56 (ISO 7091)"
	181	+params = { standard = "ISO 7091", size = "M56" }
	182	+aliases = ["ISO 7091 M56", "DIN 126 M56", "ISO7091 M56", "M56 washer"]
	183	+standard = "ISO 7091"
	184	+
	185	+[[presets]]
	186	+id = "ISO7091-M64"
	187	+title = "Flat washer, grade C M64 (ISO 7091)"
	188	+params = { standard = "ISO 7091", size = "M64" }
	189	+aliases = ["ISO 7091 M64", "DIN 126 M64", "ISO7091 M64", "M64 washer"]
	190	+standard = "ISO 7091"
	191	+
	192	+[[presets]]
	193	+id = "ISO7092-M2.5"
	194	+title = "Flat washer, small M2.5 (ISO 7092)"
	195	+params = { standard = "ISO 7092", size = "M2.5" }
	196	+aliases = ["ISO 7092 M2.5", "DIN 433 M2.5", "ISO7092 M2.5", "M2.5 washer"]
	197	+standard = "ISO 7092"
	198	+
	199	+[[presets]]
	200	+id = "ISO7092-M3"
	201	+title = "Flat washer, small M3 (ISO 7092)"
	202	+params = { standard = "ISO 7092", size = "M3" }
	203	+aliases = ["ISO 7092 M3", "DIN 433 M3", "ISO7092 M3", "M3 washer"]
	204	+standard = "ISO 7092"
	205	+
	206	+[[presets]]
	207	+id = "ISO7092-M3.5"
	208	+title = "Flat washer, small M3.5 (ISO 7092)"
	209	+params = { standard = "ISO 7092", size = "M3.5" }
	210	+aliases = ["ISO 7092 M3.5", "DIN 433 M3.5", "ISO7092 M3.5", "M3.5 washer"]
	211	+standard = "ISO 7092"
	212	+
	213	+[[presets]]
	214	+id = "ISO7092-M4"
	215	+title = "Flat washer, small M4 (ISO 7092)"
	216	+params = { standard = "ISO 7092", size = "M4" }
	217	+aliases = ["ISO 7092 M4", "DIN 433 M4", "ISO7092 M4", "M4 washer"]
	218	+standard = "ISO 7092"
	219	+
	220	+[[presets]]
	221	+id = "ISO7092-M5"
	222	+title = "Flat washer, small M5 (ISO 7092)"
	223	+params = { standard = "ISO 7092", size = "M5" }
	224	+aliases = ["ISO 7092 M5", "DIN 433 M5", "ISO7092 M5", "M5 washer"]
	225	+standard = "ISO 7092"
	226	+
	227	+[[presets]]
	228	+id = "ISO7092-M6"
	229	+title = "Flat washer, small M6 (ISO 7092)"
	230	+params = { standard = "ISO 7092", size = "M6" }
	231	+aliases = ["ISO 7092 M6", "DIN 433 M6", "ISO7092 M6", "M6 washer"]
	232	+standard = "ISO 7092"
	233	+
	234	+[[presets]]
	235	+id = "ISO7092-M8"
	236	+title = "Flat washer, small M8 (ISO 7092)"
	237	+params = { standard = "ISO 7092", size = "M8" }
	238	+aliases = ["ISO 7092 M8", "DIN 433 M8", "ISO7092 M8", "M8 washer"]
	239	+standard = "ISO 7092"
	240	+
	241	+[[presets]]
	242	+id = "ISO7092-M10"
	243	+title = "Flat washer, small M10 (ISO 7092)"
	244	+params = { standard = "ISO 7092", size = "M10" }
	245	+aliases = ["ISO 7092 M10", "DIN 433 M10", "ISO7092 M10", "M10 washer"]
	246	+standard = "ISO 7092"
	247	+
	248	+[[presets]]
	249	+id = "ISO7092-M12"
	250	+title = "Flat washer, small M12 (ISO 7092)"
	251	+params = { standard = "ISO 7092", size = "M12" }
	252	+aliases = ["ISO 7092 M12", "DIN 433 M12", "ISO7092 M12", "M12 washer"]
	253	+standard = "ISO 7092"
	254	+
	255	+[[presets]]
	256	+id = "ISO7092-M14"
	257	+title = "Flat washer, small M14 (ISO 7092)"
	258	+params = { standard = "ISO 7092", size = "M14" }
	259	+aliases = ["ISO 7092 M14", "DIN 433 M14", "ISO7092 M14", "M14 washer"]
	260	+standard = "ISO 7092"
	261	+
	262	+[[presets]]
	263	+id = "ISO7092-M16"
	264	+title = "Flat washer, small M16 (ISO 7092)"
	265	+params = { standard = "ISO 7092", size = "M16" }
	266	+aliases = ["ISO 7092 M16", "DIN 433 M16", "ISO7092 M16", "M16 washer"]
	267	+standard = "ISO 7092"
	268	+
	269	+[[presets]]
	270	+id = "ISO7092-M18"
	271	+title = "Flat washer, small M18 (ISO 7092)"
	272	+params = { standard = "ISO 7092", size = "M18" }
	273	+aliases = ["ISO 7092 M18", "DIN 433 M18", "ISO7092 M18", "M18 washer"]
	274	+standard = "ISO 7092"
	275	+
	276	+[[presets]]
	277	+id = "ISO7092-M20"
	278	+title = "Flat washer, small M20 (ISO 7092)"
	279	+params = { standard = "ISO 7092", size = "M20" }
	280	+aliases = ["ISO 7092 M20", "DIN 433 M20", "ISO7092 M20", "M20 washer"]
	281	+standard = "ISO 7092"
	282	+
	283	+[[presets]]
	284	+id = "ISO7092-M24"
	285	+title = "Flat washer, small M24 (ISO 7092)"
	286	+params = { standard = "ISO 7092", size = "M24" }
	287	+aliases = ["ISO 7092 M24", "DIN 433 M24", "ISO7092 M24", "M24 washer"]
	288	+standard = "ISO 7092"
	289	+
	290	+[[presets]]
	291	+id = "ISO7092-M30"
	292	+title = "Flat washer, small M30 (ISO 7092)"
	293	+params = { standard = "ISO 7092", size = "M30" }
	294	+aliases = ["ISO 7092 M30", "DIN 433 M30", "ISO7092 M30", "M30 washer"]
	295	+standard = "ISO 7092"
	296	+
	297	+[[presets]]
	298	+id = "ISO7092-M36"
	299	+title = "Flat washer, small M36 (ISO 7092)"
	300	+params = { standard = "ISO 7092", size = "M36" }
	301	+aliases = ["ISO 7092 M36", "DIN 433 M36", "ISO7092 M36", "M36 washer"]
	302	+standard = "ISO 7092"
	303	+
	304	+[[presets]]
	305	+id = "ISO7093-M3"
	306	+title = "Flat washer, large M3 (ISO 7093-1)"
	307	+params = { standard = "ISO 7093-1", size = "M3" }
	308	+aliases = ["ISO 7093-1 M3", "DIN 9021 M3", "fender washer M3", "ISO 7093 M3", "ISO7093 M3", "M3 washer"]
	309	+standard = "ISO 7093-1"
	310	+
	311	+[[presets]]
	312	+id = "ISO7093-M3.5"
	313	+title = "Flat washer, large M3.5 (ISO 7093-1)"
	314	+params = { standard = "ISO 7093-1", size = "M3.5" }
	315	+aliases = ["ISO 7093-1 M3.5", "DIN 9021 M3.5", "fender washer M3.5", "ISO 7093 M3.5", "ISO7093 M3.5", "M3.5 washer"]
	316	+standard = "ISO 7093-1"
	317	+
	318	+[[presets]]
	319	+id = "ISO7093-M4"
	320	+title = "Flat washer, large M4 (ISO 7093-1)"
	321	+params = { standard = "ISO 7093-1", size = "M4" }
	322	+aliases = ["ISO 7093-1 M4", "DIN 9021 M4", "fender washer M4", "ISO 7093 M4", "ISO7093 M4", "M4 washer"]
	323	+standard = "ISO 7093-1"
	324	+
	325	+[[presets]]
	326	+id = "ISO7093-M5"
	327	+title = "Flat washer, large M5 (ISO 7093-1)"
	328	+params = { standard = "ISO 7093-1", size = "M5" }
	329	+aliases = ["ISO 7093-1 M5", "DIN 9021 M5", "fender washer M5", "ISO 7093 M5", "ISO7093 M5", "M5 washer"]
	330	+standard = "ISO 7093-1"
	331	+
	332	+[[presets]]
	333	+id = "ISO7093-M6"
	334	+title = "Flat washer, large M6 (ISO 7093-1)"
	335	+params = { standard = "ISO 7093-1", size = "M6" }
	336	+aliases = ["ISO 7093-1 M6", "DIN 9021 M6", "fender washer M6", "ISO 7093 M6", "ISO7093 M6", "M6 washer"]
	337	+standard = "ISO 7093-1"
	338	+
	339	+[[presets]]
	340	+id = "ISO7093-M8"
	341	+title = "Flat washer, large M8 (ISO 7093-1)"
	342	+params = { standard = "ISO 7093-1", size = "M8" }
	343	+aliases = ["ISO 7093-1 M8", "DIN 9021 M8", "fender washer M8", "ISO 7093 M8", "ISO7093 M8", "M8 washer"]
	344	+standard = "ISO 7093-1"
	345	+
	346	+[[presets]]
	347	+id = "ISO7093-M10"
	348	+title = "Flat washer, large M10 (ISO 7093-1)"
	349	+params = { standard = "ISO 7093-1", size = "M10" }
	350	+aliases = ["ISO 7093-1 M10", "DIN 9021 M10", "fender washer M10", "ISO 7093 M10", "ISO7093 M10", "M10 washer"]
	351	+standard = "ISO 7093-1"
	352	+
	353	+[[presets]]
	354	+id = "ISO7093-M12"
	355	+title = "Flat washer, large M12 (ISO 7093-1)"
	356	+params = { standard = "ISO 7093-1", size = "M12" }
	357	+aliases = ["ISO 7093-1 M12", "DIN 9021 M12", "fender washer M12", "ISO 7093 M12", "ISO7093 M12", "M12 washer"]
	358	+standard = "ISO 7093-1"
	359	+
	360	+[[presets]]
	361	+id = "ISO7093-M14"
	362	+title = "Flat washer, large M14 (ISO 7093-1)"
	363	+params = { standard = "ISO 7093-1", size = "M14" }
	364	+aliases = ["ISO 7093-1 M14", "DIN 9021 M14", "fender washer M14", "ISO 7093 M14", "ISO7093 M14", "M14 washer"]
	365	+standard = "ISO 7093-1"
	366	+
	367	+[[presets]]
	368	+id = "ISO7093-M16"
	369	+title = "Flat washer, large M16 (ISO 7093-1)"
	370	+params = { standard = "ISO 7093-1", size = "M16" }
	371	+aliases = ["ISO 7093-1 M16", "DIN 9021 M16", "fender washer M16", "ISO 7093 M16", "ISO7093 M16", "M16 washer"]
	372	+standard = "ISO 7093-1"
	373	+
	374	+[[presets]]
	375	+id = "ISO7093-M18"
	376	+title = "Flat washer, large M18 (ISO 7093-1)"
	377	+params = { standard = "ISO 7093-1", size = "M18" }
	378	+aliases = ["ISO 7093-1 M18", "DIN 9021 M18", "fender washer M18", "ISO 7093 M18", "ISO7093 M18", "M18 washer"]
	379	+standard = "ISO 7093-1"
	380	+
	381	+[[presets]]
	382	+id = "ISO7093-M20"
	383	+title = "Flat washer, large M20 (ISO 7093-1)"
	384	+params = { standard = "ISO 7093-1", size = "M20" }
	385	+aliases = ["ISO 7093-1 M20", "DIN 9021 M20", "fender washer M20", "ISO 7093 M20", "ISO7093 M20", "M20 washer"]
	386	+standard = "ISO 7093-1"
	387	+
	388	+[[presets]]
	389	+id = "ISO7093-M24"
	390	+title = "Flat washer, large M24 (ISO 7093-1)"
	391	+params = { standard = "ISO 7093-1", size = "M24" }
	392	+aliases = ["ISO 7093-1 M24", "DIN 9021 M24", "fender washer M24", "ISO 7093 M24", "ISO7093 M24", "M24 washer"]
	393	+standard = "ISO 7093-1"
	394	+
	395	+[[presets]]
	396	+id = "ISO7093-M30"
	397	+title = "Flat washer, large M30 (ISO 7093-1)"
	398	+params = { standard = "ISO 7093-1", size = "M30" }
	399	+aliases = ["ISO 7093-1 M30", "DIN 9021 M30", "fender washer M30", "ISO 7093 M30", "ISO7093 M30", "M30 washer"]
	400	+standard = "ISO 7093-1"
	401	+
	402	+[[presets]]
	403	+id = "ISO7093-M36"
	404	+title = "Flat washer, large M36 (ISO 7093-1)"
	405	+params = { standard = "ISO 7093-1", size = "M36" }
	406	+aliases = ["ISO 7093-1 M36", "DIN 9021 M36", "fender washer M36", "ISO 7093 M36", "ISO7093 M36", "M36 washer"]
	407	+standard = "ISO 7093-1"
	408	+
	409	+[[presets]]
	410	+id = "DIN9021-M2.5"
	411	+title = "Flat washer, large M2.5 (DIN 9021)"
	412	+params = { standard = "DIN 9021", size = "M2.5" }
	413	+aliases = ["DIN 9021 M2.5", "ISO 7093 M2.5", "ISO7093 M2.5", "M2.5 washer"]
	414	+standard = "DIN 9021"
	415	+
	416	+[[presets]]
	417	+id = "DIN9021-M7"
	418	+title = "Flat washer, large M7 (DIN 9021)"
	419	+params = { standard = "DIN 9021", size = "M7" }
	420	+aliases = ["DIN 9021 M7", "ISO 7093 M7", "ISO7093 M7", "M7 washer"]
	421	+standard = "DIN 9021"
	422	+
	423	+[[presets]]
	424	+id = "DIN433-M1"
	425	+title = "Flat washer, small M1 (DIN 433)"
	426	+params = { standard = "DIN 433", size = "M1" }
	427	+aliases = ["DIN 433 M1", "ISO 7092 M1", "ISO7092 M1", "M1 washer"]
	428	+standard = "DIN 433"
	429	+
	430	+[[presets]]
	431	+id = "DIN433-M1.2"
	432	+title = "Flat washer, small M1.2 (DIN 433)"
	433	+params = { standard = "DIN 433", size = "M1.2" }
	434	+aliases = ["DIN 433 M1.2", "ISO 7092 M1.2", "ISO7092 M1.2", "M1.2 washer"]
	435	+standard = "DIN 433"
	436	+
	437	+[[presets]]
	438	+id = "DIN440V-M5"
	439	+title = "Square-hole washer M5 (DIN 440 V)"
	440	+params = { standard = "DIN 440 V", size = "M5" }
	441	+aliases = ["DIN 440 V M5", "M5 large washer", "DIN 440 M5", "DIN440 M5"]
	442	+standard = "DIN 440 V"
	443	+
	444	+[[presets]]
	445	+id = "DIN440V-M6"
	446	+title = "Square-hole washer M6 (DIN 440 V)"
	447	+params = { standard = "DIN 440 V", size = "M6" }
	448	+aliases = ["DIN 440 V M6", "M6 large washer", "DIN 440 M6", "DIN440 M6"]
	449	+standard = "DIN 440 V"
	450	+
	451	+[[presets]]
	452	+id = "DIN440V-M8"
	453	+title = "Square-hole washer M8 (DIN 440 V)"
	454	+params = { standard = "DIN 440 V", size = "M8" }
	455	+aliases = ["DIN 440 V M8", "M8 large washer", "DIN 440 M8", "DIN440 M8"]
	456	+standard = "DIN 440 V"
	457	+
	458	+[[presets]]
	459	+id = "DIN440V-M10"
	460	+title = "Square-hole washer M10 (DIN 440 V)"
	461	+params = { standard = "DIN 440 V", size = "M10" }
	462	+aliases = ["DIN 440 V M10", "M10 large washer", "DIN 440 M10", "DIN440 M10"]
	463	+standard = "DIN 440 V"
	464	+
	465	+[[presets]]
	466	+id = "DIN440V-M12"
	467	+title = "Square-hole washer M12 (DIN 440 V)"
	468	+params = { standard = "DIN 440 V", size = "M12" }
	469	+aliases = ["DIN 440 V M12", "M12 large washer", "DIN 440 M12", "DIN440 M12"]
	470	+standard = "DIN 440 V"
	471	+
	472	+[[presets]]
	473	+id = "DIN440V-M16"
	474	+title = "Square-hole washer M16 (DIN 440 V)"
	475	+params = { standard = "DIN 440 V", size = "M16" }
	476	+aliases = ["DIN 440 V M16", "M16 large washer", "DIN 440 M16", "DIN440 M16"]
	477	+standard = "DIN 440 V"
	478	+
	479	+[[presets]]
	480	+id = "DIN440V-M20"
	481	+title = "Square-hole washer M20 (DIN 440 V)"
	482	+params = { standard = "DIN 440 V", size = "M20" }
	483	+aliases = ["DIN 440 V M20", "M20 large washer", "DIN 440 M20", "DIN440 M20"]
	484	+standard = "DIN 440 V"
	485	+
	486	+[[presets]]
	487	+id = "DIN7349-M3"
	488	+title = "Heavy flat washer M3 (DIN 7349)"
	489	+params = { standard = "DIN 7349", size = "M3" }
	490	+aliases = ["DIN 7349 M3", "DIN7349 M3", "M3 washer"]
	491	+standard = "DIN 7349"
	492	+
	493	+[[presets]]
	494	+id = "DIN7349-M4"
	495	+title = "Heavy flat washer M4 (DIN 7349)"
	496	+params = { standard = "DIN 7349", size = "M4" }
	497	+aliases = ["DIN 7349 M4", "DIN7349 M4", "M4 washer"]
	498	+standard = "DIN 7349"
	499	+
	500	+[[presets]]
	501	+id = "DIN7349-M5"
	502	+title = "Heavy flat washer M5 (DIN 7349)"
	503	+params = { standard = "DIN 7349", size = "M5" }
	504	+aliases = ["DIN 7349 M5", "DIN7349 M5", "M5 washer"]
	505	+standard = "DIN 7349"
	506	+
	507	+[[presets]]
	508	+id = "DIN7349-M6"
	509	+title = "Heavy flat washer M6 (DIN 7349)"
	510	+params = { standard = "DIN 7349", size = "M6" }
	511	+aliases = ["DIN 7349 M6", "DIN7349 M6", "M6 washer"]
	512	+standard = "DIN 7349"
	513	+
	514	+[[presets]]
	515	+id = "DIN7349-M8"
	516	+title = "Heavy flat washer M8 (DIN 7349)"
	517	+params = { standard = "DIN 7349", size = "M8" }
	518	+aliases = ["DIN 7349 M8", "DIN7349 M8", "M8 washer"]
	519	+standard = "DIN 7349"
	520	+
	521	+[[presets]]
	522	+id = "DIN7349-M10"
	523	+title = "Heavy flat washer M10 (DIN 7349)"
	524	+params = { standard = "DIN 7349", size = "M10" }
	525	+aliases = ["DIN 7349 M10", "DIN7349 M10", "M10 washer"]
	526	+standard = "DIN 7349"
	527	+
	528	+[[presets]]
	529	+id = "DIN7349-M12"
	530	+title = "Heavy flat washer M12 (DIN 7349)"
	531	+params = { standard = "DIN 7349", size = "M12" }
	532	+aliases = ["DIN 7349 M12", "DIN7349 M12", "M12 washer"]
	533	+standard = "DIN 7349"
	534	+
	535	+[[presets]]
	536	+id = "DIN7349-M14"
	537	+title = "Heavy flat washer M14 (DIN 7349)"
	538	+params = { standard = "DIN 7349", size = "M14" }
	539	+aliases = ["DIN 7349 M14", "DIN7349 M14", "M14 washer"]
	540	+standard = "DIN 7349"
	541	+
	542	+[[presets]]
	543	+id = "DIN7349-M16"
	544	+title = "Heavy flat washer M16 (DIN 7349)"
	545	+params = { standard = "DIN 7349", size = "M16" }
	546	+aliases = ["DIN 7349 M16", "DIN7349 M16", "M16 washer"]
	547	+standard = "DIN 7349"
	548	+
	549	+[[presets]]
	550	+id = "DIN7349-M18"
	551	+title = "Heavy flat washer M18 (DIN 7349)"
	552	+params = { standard = "DIN 7349", size = "M18" }
	553	+aliases = ["DIN 7349 M18", "DIN7349 M18", "M18 washer"]
	554	+standard = "DIN 7349"
	555	+
	556	+[[presets]]
	557	+id = "DIN7349-M20"
	558	+title = "Heavy flat washer M20 (DIN 7349)"
	559	+params = { standard = "DIN 7349", size = "M20" }
	560	+aliases = ["DIN 7349 M20", "DIN7349 M20", "M20 washer"]
	561	+standard = "DIN 7349"
	562	+
	563	+[[presets]]
	564	+id = "DIN7349-M24"
	565	+title = "Heavy flat washer M24 (DIN 7349)"
	566	+params = { standard = "DIN 7349", size = "M24" }
	567	+aliases = ["DIN 7349 M24", "DIN7349 M24", "M24 washer"]
	568	+standard = "DIN 7349"
	569	+
	570	+[[presets]]
	571	+id = "DIN7349-M27"
	572	+title = "Heavy flat washer M27 (DIN 7349)"
	573	+params = { standard = "DIN 7349", size = "M27" }
	574	+aliases = ["DIN 7349 M27", "DIN7349 M27", "M27 washer"]
	575	+standard = "DIN 7349"
	576	+
	577	+[[presets]]
	578	+id = "DIN7349-M30"
	579	+title = "Heavy flat washer M30 (DIN 7349)"
	580	+params = { standard = "DIN 7349", size = "M30" }
	581	+aliases = ["DIN 7349 M30", "DIN7349 M30", "M30 washer"]
	582	+standard = "DIN 7349"
	583	+

README.md added in 2.0.0

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	1	+# Flat washer (ISO 7089, ISO 7091, ISO 7092, ISO 7093-1, DIN 9021, DIN 440 V, DIN 7349)
	2	+
	3	+Metric plain washers in seven standard series, with catalogue sizes as presets.
	4	+
	5	+## Geometry
	6	+
	7	+A flat ring: hole **d1** (min = nominal), outside diameter **d2** (max = nominal), thickness **h** (nominal, the
	8	+middle of the standard's min and max). DIN 440 form V has a square hole of side **a** (min). ISO 7090's outer
	9	+chamfer is not part of this recipe. The washer lies on the XY plane at the origin, its thickness along +Z.
	10	+
	11	+## Parameters
	12	+
	13	+| Parameter | Meaning |
	14	+|---|---|
	15	+| `standard` | `ISO 7089` (= DIN 125-A, normal series), `ISO 7091` (= DIN 126, grade C), `ISO 7092` (= DIN 433, small series), `ISO 7093-1` (large series), `DIN 9021` (large, sizes ISO 7093-1 lacks), `DIN 440 V` (square hole), `DIN 7349` (heavy) |
	16	+| `size` | Bolt size the washer is for; each standard has its own sizes (tables below) |
	17	+| `material` | `steel` (zinc plated), `stainless-a2`, `stainless-a4` |
	18	+
	19	+## Sources
	20	+
	21	+Dimensions in mm, from the standards' tables as reproduced on fasten.it ("reproduced by permission of DIN") and
	22	+fasteners.eu; each table names its pages. Columns: d1, d2, h.
	23	+
	24	+### ISO 7089:2000, Table 1 (DIN 125-1 form A has the same dimensions)
	25	+
	26	+DIN EN ISO 7089:2000-11, <https://fasten.it/norms/norm/din_en_iso_7089>; <https://www.fasteners.eu/standards/ISO/7089/>.
	27	+
	28	+| Size | d1 | d2 | h |
	29	+|---|---|---|---|
	30	+| M1.6 | 1.7 | 4 | 0.3 |
	31	+| M2 | 2.2 | 5 | 0.3 |
	32	+| M2.5 | 2.7 | 6 | 0.5 |
	33	+| M3 | 3.2 | 7 | 0.5 |
	34	+| M3.5 | 3.7 | 8 | 0.5 |
	35	+| M4 | 4.3 | 9 | 0.8 |
	36	+| M5 | 5.3 | 10 | 1 |
	37	+| M6 | 6.4 | 12 | 1.6 |
	38	+| M8 | 8.4 | 16 | 1.6 |
	39	+| M10 | 10.5 | 20 | 2 |
	40	+| M12 | 13 | 24 | 2.5 |
	41	+| M14 | 15 | 28 | 2.5 |
	42	+| M16 | 17 | 30 | 3 |
	43	+| M18 | 19 | 34 | 3 |
	44	+| M20 | 21 | 37 | 3 |
	45	+| M22 | 23 | 39 | 3 |
	46	+| M24 | 25 | 44 | 4 |
	47	+| M27 | 28 | 50 | 4 |
	48	+| M30 | 31 | 56 | 4 |
	49	+| M33 | 34 | 60 | 5 |
	50	+| M36 | 37 | 66 | 5 |
	51	+
	52	+### ISO 7091:2000, Table 1 (DIN 126)
	53	+
	54	+DIN EN ISO 7091:2000-11, <https://fasten.it/norms/norm/din_en_iso_7091>; <https://www.fasteners.eu/standards/ISO/7091/>.
	55	+
	56	+| Size | d1 | d2 | h |
	57	+|---|---|---|---|
	58	+| M1.6 | 1.8 | 4 | 0.3 |
	59	+| M2 | 2.4 | 5 | 0.3 |
	60	+| M2.5 | 2.9 | 6 | 0.5 |
	61	+| M3 | 3.4 | 7 | 0.5 |
	62	+| M4 | 4.5 | 9 | 0.8 |
	63	+| M5 | 5.5 | 10 | 1 |
	64	+| M6 | 6.6 | 12 | 1.6 |
	65	+| M8 | 9 | 16 | 1.6 |
	66	+| M10 | 11 | 20 | 2 |
	67	+| M12 | 13.5 | 24 | 2.5 |
	68	+| M16 | 17.5 | 30 | 3 |
	69	+| M20 | 22 | 37 | 3 |
	70	+| M24 | 26 | 44 | 4 |
	71	+| M30 | 33 | 56 | 4 |
	72	+| M36 | 39 | 66 | 5 |
	73	+| M42 | 45 | 78 | 8 |
	74	+| M48 | 52 | 92 | 8 |
	75	+| M56 | 62 | 105 | 10 |
	76	+| M64 | 70 | 115 | 10 |
	77	+
	78	+### ISO 7092:2000, Table 1 (DIN 433-1)
	79	+
	80	+DIN EN ISO 7092:2000-11, <https://fasten.it/norms/norm/din_en_iso_7092>. M36 d2 is 60 (fasten.it's DIN EN ISO 7092 and DIN 433 tables,
	81	+and <https://www.jcfasteners.com/wp-content/uploads/ISO-7092-Small-OD-Washer-B6iD10-SS316.pdf>); fasteners.eu's 58 is
	82	+the outlier. ISO 7092 covers M1.6 to M36.
	83	+
	84	+| Size | d1 | d2 | h |
	85	+|---|---|---|---|
	86	+| M1.6 | 1.7 | 3.5 | 0.3 |
	87	+| M2 | 2.2 | 4.5 | 0.3 |
	88	+| M2.5 | 2.7 | 5 | 0.5 |
	89	+| M3 | 3.2 | 6 | 0.5 |
	90	+| M3.5 | 3.7 | 7 | 0.5 |
	91	+| M4 | 4.3 | 8 | 0.5 |
	92	+| M5 | 5.3 | 9 | 1 |
	93	+| M6 | 6.4 | 11 | 1.6 |
	94	+| M8 | 8.4 | 15 | 1.6 |
	95	+| M10 | 10.5 | 18 | 1.6 |
	96	+| M12 | 13 | 20 | 2 |
	97	+| M14 | 15 | 24 | 2.5 |
	98	+| M16 | 17 | 28 | 2.5 |
	99	+| M18 | 19 | 30 | 2.5 |
	100	+| M20 | 21 | 34 | 3 |
	101	+| M24 | 25 | 39 | 4 |
	102	+| M30 | 31 | 50 | 4 |
	103	+| M36 | 37 | 60 | 5 |
	104	+
	105	+### ISO 7093-1:2000, Table 1
	106	+
	107	+DIN EN ISO 7093-1:2000-11, <https://fasten.it/norms/norm/din_en_iso_7093-1> (the only source found).
	108	+
	109	+| Size | d1 | d2 | h |
	110	+|---|---|---|---|
	111	+| M3 | 3.2 | 9 | 0.8 |
	112	+| M3.5 | 3.7 | 11 | 0.8 |
	113	+| M4 | 4.3 | 12 | 1 |
	114	+| M5 | 5.3 | 15 | 1 |
	115	+| M6 | 6.4 | 18 | 1.6 |
	116	+| M8 | 8.4 | 24 | 2 |
	117	+| M10 | 10.5 | 30 | 2.5 |
	118	+| M12 | 13 | 37 | 3 |
	119	+| M14 | 15 | 44 | 3 |
	120	+| M16 | 17 | 50 | 3 |
	121	+| M18 | 19 | 56 | 4 |
	122	+| M20 | 21 | 60 | 4 |
	123	+| M22 | 23 | 66 | 5 |
	124	+| M24 | 25 | 72 | 5 |
	125	+| M27 | 30 | 85 | 6 |
	126	+| M30 | 33 | 92 | 6 |
	127	+| M33 | 36 | 105 | 6 |
	128	+| M36 | 39 | 110 | 8 |
	129	+
	130	+### DIN 9021:1990-03 (only the sizes ISO 7093-1 lacks)
	131	+
	132	+<https://fasten.it/norms/norm/din_9021>; <https://www.fasteners.eu/standards/DIN/9021/>.
	133	+
	134	+| Size | d1 | d2 | h |
	135	+|---|---|---|---|
	136	+| M2.5 | 2.7 | 8 | 0.8 |
	137	+| M7 | 7.4 | 22 | 2 |
	138	+
	139	+### DIN 440:2001-03 form V (square hole; h nominal = middle of h min and h max)
	140	+
	141	+<https://fasten.it/norms/norm/din_440> (first table, form V).
	142	+
	143	+| Size | a | d2 | h |
	144	+|---|---|---|---|
	145	+| M5 | 5.5 | 18 | 2 |
	146	+| M6 | 6.6 | 22 | 2 |
	147	+| M8 | 9 | 28 | 3 |
	148	+| M10 | 11 | 34 | 3 |
	149	+| M12 | 14 | 44 | 4 |
	150	+| M16 | 18 | 56 | 5 |
	151	+| M20 | 22 | 72 | 6 |
	152	+| M22 | 24 | 80 | 6 |
	153	+
	154	+### DIN 433-1:1990-03 (the sizes below ISO 7092's range)
	155	+
	156	+<https://fasten.it/norms/norm/din_433>.
	157	+
	158	+| Size | d1 | d2 | h |
	159	+|---|---|---|---|
	160	+| M1 | 1.1 | 2.5 | 0.3 |
	161	+| M1.2 | 1.3 | 3 | 0.3 |
	162	+| M1.4 | 1.5 | 3 | 0.3 |
	163	+
	164	+### DIN 7349:2009-08
	165	+
	166	+<https://fasten.it/norms/norm/din_7349> (supersedes the 1974 edition); <https://www.fasteners.eu/standards/DIN/7349/>.
	167	+
	168	+| Size | d1 | d2 | h |
	169	+|---|---|---|---|
	170	+| M3 | 3.2 | 9 | 1 |
	171	+| M4 | 4.3 | 12 | 1.6 |
	172	+| M5 | 5.3 | 15 | 2 |
	173	+| M6 | 6.4 | 17 | 3 |
	174	+| M8 | 8.4 | 21 | 4 |
	175	+| M10 | 10.5 | 25 | 4 |
	176	+| M12 | 13 | 30 | 6 |
	177	+| M14 | 15 | 36 | 6 |
	178	+| M16 | 17 | 40 | 6 |
	179	+| M18 | 19 | 44 | 8 |
	180	+| M20 | 21 | 44 | 8 |
	181	+| M22 | 23 | 50 | 8 |
	182	+| M24 | 25 | 50 | 10 |
	183	+| M27 | 28 | 60 | 10 |
	184	+| M30 | 31 | 68 | 10 |
	185	+
	186	+Corrected in this audit: ISO 7092 M36 d2 58 -> 60; M1, M1.2 and M1.4 moved from "ISO 7092" (which starts at M1.6) to
	187	+DIN 433; DIN 7349 edition 1974 -> 2009-08 (same values).
	188	+
	189	+Preset list: sizes of the step.parts catalogue (MIT), see `library/NOTICE.md`. Catalogue sizes outside these tables
	190	+have no preset (ISO 7090 M3; ISO 7091 / DIN 126 M3.5, M7, M14, M18, M22, M27, M33, M39, M45, M52, M60; ISO 7093 M2).
	191	+