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Hex flange nuts, DIN 6923: M3–M20 across flats, flange diameter, height, flange thickness + M5–M16 envelope files

Name: Hex flange nuts, DIN 6923: M3–M20 across flats, flange diameter, height, flange thickness + M5–M16 envelope files dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

What are the dimensions of a DIN 6923 flange nut, and how wide is an M8 flange nut? · Standard part · basis: Westfield Fasteners' DIN 6923 table (M5 to M20) and Kanebridge's sheet (M3 to M12); the two agree on s, m and the flange diameter wherever both give a value; six envelope files

Also called: din 6923 flange nut dimensions, m8 flange nut size, m6 flange nut across flats, m10 flange nut diameter, flange nut m5 dimensions, m12 hex flange nut height, din 6923 m8 17.9 mm, flange nut pocket size m8, m16 flange nut dimensions, flange nut stl step

Exact dimensions. Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part. Mating features

length: 34.5 mm
width: 34.5 mm
height: 16.0 mm

Notes

DIN 6923 is the hexagon nut with a plain (non-serrated) flange. Westfield columns (mm): p pitch; c flange thickness (min); da bearing inner diameter (min / max); dc flange diameter (max); dw outer bearing diameter (min); e across corners (min); m nut height (max / min); s width across flats (max / min). Sizes in brackets are reference only: the page says M3 and M4 are not made to DIN 6923 and gives no bearing diameters or heights for them.
Kanebridge's sheet (F across flats max / min, H overall height max / min, B flange diameter max) agrees with Westfield on s, m and the flange diameter for M5 to M12 (e.g. M8: 13, 8.0 / 7.6, 17.9; M12: 18, 12.0 / 11.6, 26.0). Kanebridge prints M3 and M4 values (5.5 / 4.0 / 8.0 and 7.0 / 4.65 / 10.0) that agree with Westfield's reference-only figures for the across-flats size and (M4) height, but its M3 flange diameter is 8.0 against 7.8 and the page does not state units.
Files are Xem-drawn envelopes of sizes M5, M6, M8, M10, M12 and M16: a hexagon of width across flats s max, a circular flange of dc max by c min at the base, overall height m max, plain bore at the nominal thread diameter. The flange-to-body transition, chamfers and the serrated-flange variant are not modelled. Flange thickness c is a minimum, so a real flange may be thicker.
ISO 4161 and the serrated flange (DIN 6923 with serration) are not tabulated here. McMaster-Carr sells DIN 6923 flange nuts with per-part STEP; the category is linked, not copied.

Hex flange nuts, DIN 6923: M3–M20 across flats, flange diameter… size chart

source	thread	p (mm)	c min	da min / max	dc max	dw min	e min	m (height) max / min	s (across flats) max / min
Westfield (reference only)	(M3)	0.5	—	—	7.8	—	6.33	3.8	5.5
Westfield (reference only)	(M4)	0.7	—	—	10	—	7.66	4.65	7
Westfield	M5	0.8	1	5 / 5.75	11.8	9.8	8.79	5 / 4.7	8 / 7.78
Westfield	M6	1	1.1	6 / 6.75	14.2	12.2	11.05	6 / 5.7	10 / 9.78
Westfield	M8	1.25	1.2	8 / 8.75	17.9	15.8	14.38	8 / 7.6	13 / 12.73
Westfield	M10	1.5	1.5	10 / 10.8	21.8	19.6	16.64	10 / 9.6	15 / 14.73
Westfield	M12	1.75	1.8	12 / 13	26	23.8	20.03	12 / 11.6	18 / 17.73
Westfield	M14	2	2.1	14 / 15.1	29.9	27.6	23.36	14 / 13.3	21 / 20.67
Westfield	M16	2	2.4	16 / 17.3	34.5	31.9	26.75	16 / 15.3	24 / 23.67
Westfield	M20	2.5	3	20 / 21.6	42.8	39.9	32.95	20 / 18.9	30 / 29.67
Kanebridge	M3	0.5	—	—	8	—	—	4 / 3.4	5.5 / 5.3
Kanebridge	M4	0.7	—	—	10	—	—	4.65 / 4.2	7 / 6.78
Kanebridge	M5	0.8	—	—	11.8	—	—	5 / 4.7	8 / 7.78
Kanebridge	M6	1	—	—	14.2	—	—	6 / 5.7	10 / 9.78
Kanebridge	M8	1.25	—	—	17.9	—	—	8 / 7.6	13 / 12.73
Kanebridge	M10	1.5	—	—	21.8	—	—	10 / 9.6	15 / 14.73
Kanebridge	M12	1.75	—	—	26	—	—	12 / 11.6	18 / 17.73

Mating features

Drawn at the exact size. Open press, slide, run and socket features by your process's clearance (tolerances by process); leave designed gaps and clamp fits as drawn.

feature	exact	mates with	fit	files
hex body	across flats × height: M5 8 × 5, M6 10 × 6, M8 13 × 8, M10 15 × 10, M12 18 × 12, M16 24 × 16 mm (max)	hex pocket that captures the nut: width = across flats + your process clearance	slide	flange-nut-din-6923-*
flange	Ø11.8, 14.2, 17.9, 21.8, 26, 34.5 mm max × 1, 1.1, 1.2, 1.5, 1.8, 2.4 min thick (M5 to M16)	round counterbore for the flange: Ø = dc + your process clearance	slide	flange-nut-din-6923-*

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Westfield Fasteners	DIN 6923 hexagon flange nuts: c, da, dc, dw, e, m, s, r, M5 to M20 ((M3) and (M4) reference only)	web	Publisher's page; dimensions are facts
Kanebridge (fastenersresource.com)	DIN 6923 hex flange nuts M3 to M12: pitch, F across flats, H overall height, B flange diameter	web	Maker data sheet; numbers only
McMaster-Carr	DIN 6923 flange nuts (free STEP/IGES per part, for your own design use; no redistribution)	STEP, IGES, PDF	McMaster-Carr site terms: personal design use, no redistribution verify

Free files

★ Free files 6 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

flange-nut-din-6923-m5-s-8-dc-11.8-m-5	M5 DIN 6923 hex flange nut envelope: hex 8 mm across flats (s max), flange Ø11.8 (dc max) × 1 mm (c min) at the base, overall height 5 mm (m max), plain Ø5 bore; no chamfer, serration or thread	STEP · STL
flange-nut-din-6923-m6-s-10-dc-14.2-m-6	M6 DIN 6923 hex flange nut envelope: hex 10 mm across flats (s max), flange Ø14.2 (dc max) × 1.1 mm (c min) at the base, overall height 6 mm (m max), plain Ø6 bore; no chamfer, serration or thread	STEP · STL
flange-nut-din-6923-m8-s-13-dc-17.9-m-8	M8 DIN 6923 hex flange nut envelope: hex 13 mm across flats (s max), flange Ø17.9 (dc max) × 1.2 mm (c min) at the base, overall height 8 mm (m max), plain Ø8 bore; no chamfer, serration or thread	STEP · STL
flange-nut-din-6923-m10-s-15-dc-21.8-m-10	M10 DIN 6923 hex flange nut envelope: hex 15 mm across flats (s max), flange Ø21.8 (dc max) × 1.5 mm (c min) at the base, overall height 10 mm (m max), plain Ø10 bore; no chamfer, serration or thread	STEP · STL
flange-nut-din-6923-m12-s-18-dc-26-m-12	M12 DIN 6923 hex flange nut envelope: hex 18 mm across flats (s max), flange Ø26 (dc max) × 1.8 mm (c min) at the base, overall height 12 mm (m max), plain Ø12 bore; no chamfer, serration or thread	STEP · STL
flange-nut-din-6923-m16-s-24-dc-34.5-m-16	M16 DIN 6923 hex flange nut envelope: hex 24 mm across flats (s max), flange Ø34.5 (dc max) × 2.4 mm (c min) at the base, overall height 16 mm (m max), plain Ø16 bore; no chamfer, serration or thread	STEP · STL

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Plain text: sheet.txt · JSON: /api/geometry?object=flange-nuts-din-6923