Engineering Data 2.2 / System C

ISO 4032 HEX NUT — DIMENSIONS, WEIGHTS & DIN 934 EQUIVALENCE

ISO 4032:2023 specifies hexagon regular nuts (style 1) in steel and stainless steel, with metric coarse pitch threads from M1.6 to M64, in product grades A and B. It is the current international standard behind the legacy DIN 934 designation, and the two call out the same dimensions — all 29 sizes in our compiled table match. This page gives the complete nut tables with tolerances, theoretical weight per 1,000 pieces and the DIN 934 equivalence.

1. Standard Identity

Standard

ISO 4032:2023 (5th edition, current)

Type

Hexagon regular nut, style 1

Product grades

A and B

Size range

M1.6 – M64 (preferred threads)

Dimensional equivalent

DIN 934 (29/29 sizes identical)

Property classes

ISO 898-2 (steel) / ISO 3506-2 (stainless)

2. Dimensions — preferred threads, M1.6 to M12

Table 1 — preferred threads, M1.6 to M12
Parameter (mm)	M1.6	M2	M2.5	M3	M4	M5	M6	M8	M10	M12
P — pitch (mm)	0.35	0.4	0.45	0.5	0.7	0.8	1	1.25	1.5	1.75
c — max	0.2	0.2	0.3	0.4	0.4	0.5	0.5	0.6	0.6	0.6
c — min	0.1	0.1	0.1	0.15	0.15	0.15	0.15	0.15	0.15	0.15
da — max	1.84	2.3	2.9	3.45	4.6	5.75	6.75	8.75	10.8	13
da — min	1.6	2	2.5	3	4	5	6	8	10	12
dw — min	2.4	3.1	4.1	4.6	5.9	6.9	8.9	11.6	14.6	16.6
e (across corners) — min	3.41	4.32	5.45	6.01	7.66	8.79	11.05	14.38	17.77	20.03
m — max	1.3	1.6	2	2.4	3.2	4.7	5.2	6.8	8.4	10.8
m — min	1.05	1.35	1.75	2.15	2.9	4.4	4.9	6.44	8.04	10.37
mw — min	0.8	1.1	1.4	1.7	2.3	3.5	3.9	5.2	6.4	8.3
s (across flats) — nominal = max	3.2	4	5	5.5	7	8	10	13	16	18
s — min	3.02	3.82	4.82	5.32	6.78	7.78	9.78	12.73	15.73	17.73

Source: ISO 4032:2023, Table 1 — compiled table (see Sources).

3. Dimensions — preferred threads, M16 to M64

Table 2 — preferred threads, M16 to M64
Parameter (mm)	M16	M20	M24	M30	M36	M42	M48	M56	M64
P — pitch (mm)	2	2.5	3	3.5	4	4.5	5	5.5	6
c — max	0.8	0.8	0.8	0.8	0.8	1	1	1	1
c — min	0.2	0.2	0.2	0.2	0.2	0.3	0.3	0.3	0.3
da — max	17.3	21.6	25.9	32.4	38.9	45.4	51.8	60.5	69.1
da — min	16	20	24	30	36	42	48	56	64
dw — min	22.5	27.7	33.3	42.8	51.1	60	69.5	78.7	88.2
e (across corners) — min	26.75	32.95	39.55	50.85	60.79	71.3	82.6	93.56	104.86
m — max	14.8	18	21.5	25.6	31	34	38	45	51
m — min	14.1	16.9	20.2	24.3	29.4	32.4	36.4	43.4	49.1
mw — min	11.3	13.5	16.2	19.4	23.5	25.9	29.1	34.7	39.3
s (across flats) — nominal = max	24	30	36	46	55	65	75	85	95
s — min	23.67	29.16	35	45	53.8	63.1	73.1	82.8	92.8

Source: ISO 4032:2023, Table 2 — compiled table (see Sources).

4. Dimensions — non-preferred threads

Table 3 — non-preferred threads
Parameter (mm)	M3.5	M14	M18	M22	M27	M33	M39	M45	M52	M60
P — pitch (mm)	0.6	2	2.5	2.5	3	3.5	4	4.5	5	5.5
c — max	0.4	0.6	0.8	0.8	0.8	0.8	1	1	1	1
c — min	0.15	0.15	0.2	0.2	0.2	0.2	0.3	0.3	0.3	0.3
da — max	4	15.1	19.5	23.7	29.1	35.6	42.1	48.6	56.2	64.8
da — min	3.5	14	18	22	27	33	39	45	52	60
dw — min	5	19.6	24.9	31.4	38	46.6	55.9	64.7	74.2	83.4
e (across corners) — min	6.58	23.36	29.56	37.29	45.2	55.37	66.44	76.95	88.25	99.21
m — max	2.8	12.8	15.8	19.4	23.8	28.7	33.4	36	42	48
m — min	2.55	12.1	15.1	18.1	22.5	27.4	31.8	34.4	40.4	46.4
mw — min	2	9.7	12.1	14.5	18	21.9	25.4	27.5	32.3	37.1
s (across flats) — nominal = max	6	21	27	34	41	50	60	70	80	90
s — min	5.82	20.67	26.16	33	40	49	58.8	68.1	78.1	87.8

Source: ISO 4032:2023, Table 3 — compiled table (see Sources).

5. Weight per 1,000 pieces (theoretical)

Size	Weight per 1,000 pcs
M6	2.38 kg
M8	5.13 kg
M10	9.44 kg
M12	14.20 kg
M16	34.59 kg
M20	65.74 kg
M24	113.08 kg

Geometric estimate at 7.85 g/cm³, ±5%, excluding coating and chamfers — not a weighing certificate. Use the weight calculator for other sizes.

6. Materials and finishes

Nuts are quoted in carbon steel and stainless steel (A2 / A4), with the same finish options as the matching bolts: zinc plating, hot-dip galvanizing, zinc-nickel and dacromet. For stainless grades see mechanical properties; coating comparisons are in surface treatment.

7. Equivalent standards

Standard	Relationship	Note
DIN 934	Dimensionally equivalent (hexagon regular nut)	29/29 sizes match in our data
ISO 4033	Hexagon thin nut — not interchangeable	Thinner nut; use only where the drawing calls it
ASME B18.2.2	Inch series — not interchangeable	Different thread and head geometry

8. How to order

State the size (M10, M12 …), property class or stainless grade, finish, and quantity. If the drawing says DIN 934, say so — the dimensions are the same and we quote either designation.

ISO 4032 hex nut — product page Request a quotation

9. FAQ

Is ISO 4032 the same as DIN 934?

Dimensionally yes. In our compiled data all 29 sizes match DIN 934 size by size (P, c, da, dw, e, m, mw and s). DIN 934 is the legacy German designation; ISO 4032:2023 is the current international standard.

What does “style 1” mean?

ISO 4032 covers hexagon regular nuts, style 1 — the standard-height nut. Style 2 nuts are taller and are covered by a different standard; do not substitute one for the other when height matters.

What sizes does ISO 4032 cover?

Preferred threads run from M1.6 to M64. Non-preferred sizes (M3.5, M14, M18, M22, M27, M33, M39, M45, M52, M60) are in the third table on this page.

Which nut fits an M10 bolt?

The M10 nut: width across flats s = 16 mm, nut height m = 8.4 mm, across-corners e = 17.77 mm, bearing face dw = 14.6 mm.

What do c, da, dw, e, m and s mean?

c = chamfer, da = thread minor diameter at the nut face, dw = bearing face diameter (min), e = width across corners (min), m = nut height, s = width across flats. All values are in millimetres.

What property classes are available?

Property class selection for steel nuts follows ISO 898-2 and for stainless nuts ISO 3506-2. Our data set currently lists A2-70 and A4-70 stainless grades; steel classes are confirmed against the drawing or order.

How much does one ISO 4032 nut weigh?

See the weight table: an M10 nut is about 9.44 kg per 1,000 pieces; M16 about 34.59 kg per 1,000. Values are geometric estimates, not a weighing certificate.

Is DIN 934 still valid?

DIN 934 is a legacy designation still widely used on drawings; the current international standard is ISO 4032:2023. Both call out the same nut dimensions.

10. Sources and version

Dimensions: ISO 4032:2023 hexagon regular nuts (style 1) table, compiled in our data set (source: fasteners.eu, retrieved 2026-10-28) and cross-checked against DIN 934 — 29 of 29 sizes identical. Weights: theoretical geometric estimate at 7.85 g/cm³ per 1,000 pieces. Per-size pages: ISO 4032 size chart. Page last reviewed: 2026-10-29.