304 stainless steel hex nuts for industrial fastening

black oxide hex nuts with custom surface finish

stainless steel thin jam nuts for locking and positioning

stainless steel heavy hex nuts for high load assemblies

black finish hex nuts for custom fastening applications

Stainless Steel Hex Nuts

Stainless steel hex nuts are widely used for corrosion-resistant fastening in machinery, construction, marine hardware, outdoor structures, chemical equipment, and general industrial assemblies. ViaWay Global supplies standard hex nuts, heavy hex nuts, thin jam nuts, and custom nut solutions in 304/A2, 316/A4, 316L, duplex stainless steel, titanium, and other special alloy materials.

Our hex nuts can be supplied according to DIN, ISO, ASME, JIS, and project-specific requirements. For standard sizes, we support stable bulk supply; for special applications, we can provide custom thread pitches, oversized dimensions, special materials, surface treatments, and drawing-based manufacturing.

Carbon steel and alloy steel nuts are also available on request, but our main focus is stainless steel, corrosion-resistant materials, and custom fastener solutions for global B2B buyers.

Product Specifications

Size:
Metric M2 to M72 depending on standard, material, and production method. Inch sizes according to ASME standards are available, with oversized or non-standard nuts quoted based on drawings or samples.
Material:
Stainless Steel: 304/A2, 316/A4, 316L, 18-8 stainless steel.
Special Alloys: Duplex stainless steel, titanium, nickel alloys, 904L, 254SMO, and other corrosion-resistant materials available on request.
Carbon Steel / Alloy Steel: Available on request for general industrial or high-strength applications.
Nut Types:
Standard Hex, Heavy Hex, Thin/Jam Nut, Long/Coupling Nut, Left Hand Thread
Standards:
DIN 934, DIN 439, ISO 4032, ISO 4035, ASME B18.2.2, ASME B18.2.4.1M-6M, JIS B1181
Thread Pitch:
Coarse, Fine, Extra Fine (e.g., M8x1.0, M12x1.25, M14x1.5, 5/8-24)
Surface Finish:
Plain, Zinc Plated, Hot Dip Galvanized (HDG), Black Oxide, PTFE, etc.
Manufacturing:
Cold forging for standard sizes and stable-volume production. CNC machining for oversized nuts, special materials, small batches, non-standard dimensions, and custom thread requirements.

Applications

Stainless steel hex nuts are suitable for industrial assemblies where corrosion resistance, reliable thread engagement, and long service life are important. They are commonly used in machinery, marine hardware, outdoor structures, construction fastening, electrical equipment, chemical processing equipment, maintenance projects, and threaded rod assemblies.

304 stainless steel hex nuts are suitable for general corrosion-resistant applications, while 316 and 316L stainless steel are recommended for marine, humid, outdoor, and chloride-exposed environments. Duplex stainless steel, titanium, nickel alloys, and other special materials can be supplied for demanding applications involving higher corrosion resistance, reduced weight, or project-specific performance.

Heavy hex nuts are used where a larger bearing surface and higher load distribution are required. Thin jam nuts are suitable for locking, positioning, or limited-space assemblies. Fine thread and left-hand thread options are available for equipment, rotating components, and special fastening designs.

Manufacturing & Customization

ViaWay Global supports both standard and custom hex nuts for B2B buyers. Standard stainless steel hex nuts can be supplied according to DIN, ISO, ASME, and JIS requirements, while custom nuts can be manufactured based on drawings, samples, thread specifications, material requirements, or application conditions.

Custom options include non-standard dimensions, oversized nuts, fine thread or extra fine thread, left-hand thread, special materials, passivation, polishing, PTFE coating, black finish, and project-specific packaging. For stainless steel and special alloy nuts, we can support material confirmation, dimensional inspection, thread checking, surface finish inspection, and documentation according to order requirements.

If you are not sure which standard, material, or thread type is suitable, you can send us your drawing, size list, sample photo, or application details. Our team will help confirm the available production options before quotation.

Hex Nut Dimensions

Hex Nuts Dimensions-DIN 934

Thread Size d	P			m		mw	s		e ①
Thread Size d	Pitch Coarse thread	Pitch Fine thread-1	Pitch Fine thread-2	max=nominal size	min	min	max=nominal size	min	min	*
M1	0.25	/	/	0.8	0.55	0.44	2.5	2.4	2.71	-
M1.2	0.25	/	/	1	0.75	0.6	3	2.9	3.28	-
M1.4	0.3	/	/	1.2	0.95	0.76	3	2.9	3.28	-
M1.6	0.35	/	/	1.3	1.05	0.84	3.2	3.02	3.41	-
(M1.7)	0.35	/	/	1.4	1.15	0.92	3.5	3.38	3.82	-
M2	0.4	/	/	1.6	1.35	1.08	4	3.82	4.32	-
(M2.3)	0.45	/	/	1.8	1.55	1.24	4.5	4.32	4.88	-
M2.5	0.45	/	/	2	1.75	1.4	5	4.82	5.45	-
(M2.6)	0.45	/	/	2	1.75	1.4	5	4.82	5.45	-
M3	0.5	/	/	2.4	2.15	1.72	5.5	5.32	6.01	-
(M3.5)	0.6	/	/	2.8	2.55	2.04	6	5.82	6.58	-
M4	0.7	/	/	3.2	2.9	2.32	7	6.78	7.66	-
M5	0.8	/	/	4	3.7	2.96	8	7.78	8.79	-
M6	1	/	/	5	4.7	3.76	10	9.78	11.05	-
(M7)	1	/	/	5.5	5.2	4.16	11	10.73	12.12	-
M8	1.25	1	/	6.5	6.14	4.91	13	12.73	14.38	-
M10	1.5	1	1.25	8	7.64	6.11	17	16.73	18.9	-
M12	1.75	1.5	1.25	10	9.64	7.71	19	18.67	21.1	-
(M14)	2	1.5	/	11	10.3	8.24	22	21.67	24.49	-
M16	2	1.5	/	13	12.3	9.84	24	23.67	26.75	-
(M18)	2.5	1.5	2	15	14.3	11.44	27	26.16	29.56	-
M20	2.5	2	1.5	16	14.9	11.92	30	29.16	32.95	-
(M22)	2.5	1.5	2	18	16.9	13.52	32	31	35.03	-
M24	3	2	/	19	17.7	14.16	36	35	39.55	-
(M27)	3	2	/	22	20.7	16.56	41	40	45.2	-
M30	3.5	2	/	24	22.7	18.16	46	45	50.85	-
(M33)	3.5	2	/	26	24.7	19.76	50	49	55.37	-
M36	4	3	/	29	27.4	21.92	55	53.8	60.79	-
(M39)	4	3	/	31	29.4	23.52	60	58.8	66.44	-
M42	4.5	3	/	34	32.4	25.9	65	63.1	71.3	-
(M45)	4.5	3	/	36	34.4	27.5	70	68.1	76.95	-
M48	5	3	/	38	36.4	29.1	75	73.1	82.6	-
(M52)	5	3	/	42	40.4	32.3	80	78.1	88.25	-
M56	5.5	4	/	45	43.4	34.7	85	82.8	93.56	-
(M60)	5.5	4	/	48	46.4	37.1	90	87.8	99.21	-
M64	6	4	/	51	49.1	39.3	95	92.8	104.86	-
(M68)	6	/	4	54	52.1	41.7	100	97.8	110.51	-
M72	/	6	4	58	56.1	44.9	105	102.8	116.16	-
(M76)	/	6	4	61	59.1	47.3	110	107.8	121.81	-
M80	/	6	4	64	62.1	49.7	115	112.8	127.46	-
(M85)	/	6	4	68	66.1	52.9	120	117.8	133.11	-
M90	/	6	4	72	70.1	56.1	130	127.5	144.08	-
M100	/	6	4	80	78.1	62.5	145	142.5	161.02	-
M110	/	6	4	88	85.8	68.6	155	152.5	172.32	170
M125	/	6	4	100	97.8	78.2	180	177.5	200.57	196
M140	/	6	/	112	109.8	87.8	200	195.4	220.8	216
M160	/	6	/	128	125.5	100	230	225.4	254.7	248

①,* In the case of sizes of M110 or more, the hexagon edges may be radiused.
②,This standard has been replaced by ISO 4032, ISO 8673 and ISO 8674

Hexagon Regular Nuts Dimension- ISO 4032

Thread Size	D	P	c		da		dw	e	m		mw	s
Thread Size	D	Pitch	max	min	max	min	min	min	max	min	min	max=nominal size	min
M1.6 ①		0.35	0.25	0.1	1.84	1.6	2.54	3.41	1.3	1.05	0.84	3.2	3.02
M2 ①		0.4	0.25	0.1	2.3	2	3.34	4.32	1.6	1.35	1.08	4	3.82
M2.5 ①		0.45	0.25	0.1	2.88	2.5	4.34	5.45	2	1.75	1.4	5	4.82
M3 ①		0.5	0.4	0.15	3.45	3	4.84	6.01	2.4	2.15	1.72	5.5	5.32
(M3.5) ①		0.6	0.4	0.15	4.03	3.5	5.34	6.58	2.8	2.55	2.04	6	5.82
M4 ①		0.7	0.4	0.15	4.6	4	6.2	7.66	3.2	2.9	2.32	7	6.78
M5	grade A	0.8	0.5	0.15	5.75	5	7.2	8.79	4.7	4.4	3.52	8	7.78
M6	grade A	1	0.5	0.15	6.75	6	8.88	11.05	5.2	4.9	3.92	10	9.78
(M7)	grade A	1	0.6	0.15	7.75	7	9.63	12.12	6.5	6.14	4.91	11	10.73
M8	grade A	1.25	0.6	0.15	8.75	8	11.63	14.38	6.8	6.44	5.15	13	12.73
M10	grade A	1.5	0.6	0.15	10.8	10	14.63	17.77	8.4	8.04	6.43	16	15.73
M12	grade A	1.75	0.6	0.15	12.96	12	16.63	20.03	10.8	10.37	8.3	18	17.73
(M14)	grade A	2	0.6	0.15	15.12	14	19.64	23.36	12.8	12.1	9.68	21	20.67
M16	grade A	2	0.8	0.2	17.28	16	22.49	26.75	14.8	14.1	11.28	24	23.67
(M18)	grade B	2.5	0.8	0.2	19.44	18	24.85	29.56	15.8	15.1	12.08	27	26.16
M20	grade B	2.5	0.8	0.2	21.6	20	27.7	32.95	18	16.9	13.52	30	29.16
(M22)	grade B	2.5	0.8	0.2	23.76	22	31.35	37.29	19.4	18.1	14.48	34	33
M24	grade B	3	0.8	0.2	25.92	24	33.25	39.55	21.5	20.2	16.16	36	35
(M27)	grade B	3	0.8	0.2	29.16	27	38	45.2	23.8	22.5	18	41	40
M30	grade B	3.5	0.8	0.2	32.4	30	42.75	50.85	25.6	24.3	19.44	46	45
(M33)	grade B	3.5	0.8	0.2	35.64	33	46.55	55.37	28.7	27.4	21.92	50	49
M36	grade B	4	0.8	0.2	38.88	36	51.11	60.79	31	29.4	23.52	55	53.8
(M39)	grade B	4	1	0.3	42.12	39	55.86	66.44	33.4	31.8	25.44	60	58.8
M42 ①		4.5	1	0.3	45.36	42	59.95	71.3	34	32.4	25.92	65	63.1
(M45) ①		4.5	1	0.3	48.6	45	64.7	76.95	36	34.4	27.52	70	68.1
M48 ①		5	1	0.3	51.84	48	69.45	82.6	38	36.4	29.12	75	73.1
(M52) ①		5	1	0.3	56.16	52	74.2	88.25	42	40.4	32.32	80	78.1
M56 ①		5.5	1	0.3	60.48	56	78.66	93.56	45	43.4	34.72	85	82.8
(M60) ①		5.5	1	0.3	64.8	60	83.41	99.21	48	46.4	37.12	90	87.8
M64 ①		6	1	0.3	69.12	64	88.16	104.86	51	49.1	39.28	95	92.8

Hex Nuts and Hex Jam Nuts Dimensions - ASME B 18.2.2 Table 5

Screw Thread d	d	PP			s		e		m		m1
Screw Thread d	d	UNC	UNF	8-UN	min	max	min	max	min	max	min	max
1/4	0.25	20	28	-	0.428	0.438	0.488	0.505	0.212	0.226	0.15	0.163
5/16	0.3125	18	24	-	0.489	0.5	0.557	0.577	0.258	0.273	0.18	0.195
3/8	0.375	16	24	-	0.551	0.563	0.628	0.65	0.32	0.337	0.21	0.227
7/16	0.4375	14	20	-	0.675	0.688	0.768	0.794	0.365	0.385	0.24	0.26
1/2	0.5	13	20	-	0.736	0.75	0.84	0.866	0.427	0.448	0.302	0.323
9/16	0.5625	12	18	-	0.861	0.875	0.982	1.01	0.473	0.496	0.301	0.324
5/8	0.625	11	18	-	0.922	0.938	1.051	1.083	0.535	0.559	0.363	0.387
3/4	0.75	10	16	-	1.088	1.125	1.24	1.299	0.617	0.665	0.398	0.446
7/8	0.875	9	14	-	1.269	1.312	1.447	1.516	0.724	0.776	0.458	0.51
1	1	8	12	-	1.45	1.5	1.653	1.732	0.831	0.887	0.519	0.575
1-1/8	1.125	7	12	8	1.631	1.688	1.859	1.949	0.939	0.999	0.579	0.639
1-1/4	1.25	7	12	8	1.812	1.875	2.066	2.165	1.03	1.094	0.687	0.751
1-3/8	1.375	6	12	8	1.994	2.062	2.273	2.382	1.138	1.206	0.747	0.815
1-1/2	1.5	6	12	8	2.175	2.25	2.48	2.598	1.245	1.317	0.808	0.88
1-5/8	1.625	-	-	8	2.35	2.43	2.679	2.805	1.364	1.416	0.868	0.944
1-3/4	1.75	5	-	8	2.538	2.625	2.893	3.031	1.46	1.54	0.929	1.009
1-7/8	1.875	-	-	8	2.722	2.813	3.103	3.247	1.567	1.651	0.989	1.073
2	2	4-1/2	-	8	2.9	3	3.306	3.464	1.675	1.763	1.05	1.138
2-1/4	2.25	4-1/2	-	8	3.263	3.375	3.719	3.897	1.89	1.986	1.155	1.267
2-1/2	2.5	4	-	8	3.625	3.75	4.133	4.33	2.105	2.209	1.401	1.427
2-3/4	2.75	4	-	8	3.988	4.125	4.546	4.763	2.319	2.431	1.522	1.556
3	3	4	-	8	4.35	4.5	4.959	5.196	2.534	2.654	1.643	1.685
3-1/4	3.25	4	-	8	4.713	4.875	5.373	5.629	2.749	2.877	1.748	1.814
3-1/2	3.5	4	-	8	5.075	5.25	5.786	6.062	2.964	3.1	1.87	1.943
3-3/4	3.75	4	-	8	5.438	5.625	6.199	6.495	3.178	3.322	1.99	2.072
4	4	4	-	8	5.8	6	6.612	6.928	3.393	3.545	2.112	2.201

Heavy Hex Nuts and Heavy Hex Jam Nuts Dimensions - ASME B 18.2.2 Table 11

Screw Thread d	d	PP			s			e		m			m1
Screw Thread d	d	UNC	UNF	8-UN	Nominal Size	min	max	min	max	Nominal Size	min	max	Nominal Size	min	max
1/4	0.25	20	28	-	1/2	0.488	0.5	0.556	0.577	15/64	0.218	0.25	11/64	0.156	0.188
5/16	0.3125	18	24	-	9/16	0.546	0.562	0.622	0.65	19/64	0.28	0.314	13/64	0.186	0.22
3/8	0.375	16	24	-	11/16	0.669	0.688	0.763	0.794	23/64	0.341	0.377	15/64	0.216	0.252
7/16	0.4375	14	20	-	3/4	0.728	0.75	0.83	0.866	27/64	0.403	0.441	17/64	0.247	0.285
1/2	0.5	13	20	-	7/8	0.85	0.875	0.969	1.01	31/64	0.464	0.504	19/64	0.277	0.317
9/16	0.5625	12	18	-	15/16	0.909	0.938	1.037	1.083	35/64	0.526	0.568	21/64	0.307	0.349
5/8	0.625	11	18	-	1-1/16	1.031	1.062	1.175	1.227	39/64	0.587	0.631	23/64	0.337	0.381
3/4	0.75	10	16	-	1-1/4	1.212	1.25	1.382	1.443	47/64	0.71	0.758	27/64	0.398	0.446
7/8	0.875	9	14	-	1-7/16	1.394	1.438	1.589	1.66	55/64	0.833	0.885	31/64	0.458	0.51
1	1	8	12	-	1-5/8	1.575	1.625	1.796	1.876	63/64	0.956	1.012	35/64	0.519	0.575
1-1/8	1.125	7	12	8	1-13/16	1.756	1.812	2.002	2.093	1-7/64	1.079	1.139	39/64	0.579	0.639
1-1/4	1.25	7	12	8	2	1.938	2	2.209	2.309	1-7/32	1.187	1.251	23/32	0.687	0.751
1-3/8	1.375	6	12	8	2-3/16	2.119	2.188	2.416	2.526	1-11/32	1.31	1.378	25/32	0.747	0.815
1-1/2	1.5	6	12	8	2-3/8	2.3	2.375	2.622	2.742	1-15/32	1.433	1.505	27/32	0.808	0.88
1-5/8	1.625	-	-	8	2-9/16	2.481	2.562	2.828	2.959	1-19/32	1.556	1.632	29/32	0.868	0.944
1-3/4	1.75	5	-	8	2-3/4	2.662	2.75	3.035	3.175	1-23/32	1.679	1.759	31/32	0.929	1.009
1-7/8	1.875	-	-	8	2-15/16	2.844	2.938	3.242	3.392	1-27/32	1.802	1.886	1-1/32	0.989	1.073
2	2	4-1/2	-	8	3-1/8	3.025	3.125	3.449	3.608	1-31/32	1.925	2.013	1-3/32	1.05	1.138
2-1/4	2.25	4-1/2	-	8	3-1/2	3.388	3.5	3.862	4.041	2-13/64	2.155	2.251	1-13/64	1.155	1.251
2-1/2	2.5	4	-	8	3-7/8	3.75	3.875	4.275	4.474	2-29/64	2.401	2.505	1-29/64	1.401	1.505
2-3/4	2.75	4	-	8	4-1/4	4.112	4.25	4.688	4.907	2-45/64	2.647	2.759	1-37/64	1.522	1.634
3	3	4	-	8	4-5/8	4.475	4.625	5.102	5.34	2-61/64	2.893	3.013	1-45/64	1.643	1.763
3-1/4	3.25	4	-	8	5	4.838	5	5.515	5.774	3-3/16	3.124	3.252	1-13/16	1.748	1.876
3-1/2	3.5	4	-	8	5-3/8	5.2	5.375	5.928	6.207	3-7/16	3.37	3.506	1-15/16	1.87	2.006
3-3/4	3.75	4	-	8	5-3/4	5.562	5.75	6.341	6.64	3-11/16	3.616	3.76	2-1/16	1.99	2.134
4	4	4	-	8	6-1/8	5.925	6.125	6.755	7.073	3-15/16	3.862	4.014	2-3/16	2.112	2.264

Metric Heavy Hex Nuts Dimensions - ASME B 18.2.4.6M

Thread Size d	P	s		e		m		c		dw
Thread Size d	Pitch	max	min	max	min	max	min	max	min	min
M12	1.75	21	20.16	24.25	22.78	12.3	11.9	0.8	0.4	19.2
M14	2	24	23.16	27.71	26.17	14.3	13.6	0.8	0.4	22
M16	2	27	26.16	31.18	29.56	17.1	16.4	0.8	0.4	24.9
M20	2.5	34	33	39.26	37.29	20.7	19.4	0.8	0.4	31.4
M22	2.5	36	35	41.57	39.55	23.6	22.3	0.8	0.4	33.3
M24	3	41	40	47.34	45.2	24.2	22.9	0.8	0.4	38
M27	3	46	45	53.12	50.85	27.5	26.3	0.8	0.4	42.8
M30	3.5	50	49	57.74	55.37	30.7	29.1	0.8	0.4	45.6
M36	4	60	58.8	69.28	66.44	36.6	35	0.8	0.4	55.9
M42	4.5	70	67.9	80.83	77.41	42	40.4	1	0.5	64.5
M48	5	80	77.6	92.38	88.46	48	46.4	1	0.5	73.7
M56	5.5	90	87.2	103.92	99.41	56	54.1	1	0.5	82.8
M64	6	100	96.8	115.47	110.35	64	62.1	1	0.5	92
M72	6	110	106.4	127.02	121.3	72	70.1	1.2	0.6	101.1
M80	6	120	116	138.56	132.24	80	78.1	1.2	0.6	110.2
M90	6	135	130.5	155.88	148.77	90	87.8	1.2	0.6	124
M100	6	150	145	173.21	165.3	100	97.8	1.2	0.6	137.8

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Not sure about the exact nut standard, thread type, or material? No problem. Send us your drawing, size list, standard number, sample photo, or application details. Our team will help confirm the suitable material, dimensions, thread type, surface finish, and production method.

Standard or Drawing

DIN 934, ISO 4032, ASME B18.2.2, JIS B1181, DIN 439, ISO 4035, ASME heavy hex nut standards, or custom drawings.

Size or Sample Photo

Thread size, pitch, width across flats, nut height, quantity, or a clear sample photo if you are not sure about the exact specification.

Material Preference

304, 316, 316L, 18-8 stainless steel, duplex stainless steel, titanium, nickel alloys, or other special materials. Carbon steel options are available on request.

Quantity & Application

Estimated quantity, packaging needs, surface finish requirements, and where the nuts will be used.