304 stainless steel non-serrated hex flange nuts DIN 6923

Stainless steel nylon insert flange nuts DIN 6926

316 stainless steel serrated flange nuts with wide bearing flange

Serrated flange nut bottom view showing locking teeth

Stainless Steel Flange Nuts

ViaWay Global supplies stainless steel flange nuts for industrial, marine, construction, machinery, and equipment assembly applications. Designed with an integrated flange base, these nuts help distribute load over a wider bearing surface and can reduce the need for separate washers in many assemblies.

Our flange nuts are available in A2/304, A4/316, 316L, and 18-8 stainless steel, with titanium, duplex stainless steel, nickel alloys, and other special materials available for custom requirements. Standard options include DIN 6923, ISO 4161, ASME B18.2.2, and DIN 6926 nylon insert flange nuts, covering serrated, non-serrated, nylon insert, and custom flange designs.

Carbon steel and plated finishes are also available on request for cost-sensitive or general indoor applications.

Product Specifications

Size Range
Metric sizes according to DIN 6923 / ISO 4161, with common sizes from M5 to M20 shown in the dimension tables. Extended metric sizes, imperial sizes, and custom dimensions are available on request.
Materials
Stainless Steel: A2/304, A4/316, 316L, 18-8 stainless steel
Special Alloys: Titanium, duplex stainless steel, nickel alloys, and other corrosion-resistant materials available for custom requirements
Carbon Steel: Available on request for general indoor or cost-sensitive applications
Standards
DIN 6923, ISO 4161, ASME B18.2.2, DIN 6926 nylon insert flange nuts, and related customer-specified standards
Flange Face Types
Serrated flange nuts, non-serrated flange nuts, nylon insert flange nuts, wide flange designs, and custom flange configurations
Thread Options
Metric coarse thread, metric fine thread, UNC, UNF, and custom thread specifications according to drawings or project requirements
Surface Finish / Treatment
Plain stainless steel, passivated, polished, and other stainless steel surface treatments. Zinc plating, black oxide, and hot dip galvanizing are available for carbon steel items on request.

Applications

Stainless steel flange nuts are commonly used in machinery assembly, equipment frames, control cabinets, construction hardware, marine fittings, outdoor structures, and corrosion-prone industrial environments. The integrated flange base helps distribute clamping force over a wider surface, making them suitable for assemblies where stable load distribution and simplified installation are required.

Serrated flange nuts are suitable for applications exposed to vibration, such as machinery, equipment panels, brackets, and structural assemblies. Non-serrated flange nuts are preferred when the mating surface should not be damaged or when a smoother bearing surface is required.

For humid, outdoor, marine, or chemical environments, A2/304 and A4/316 stainless steel options are recommended. Titanium, duplex stainless steel, nickel alloys, and other special materials can be supplied for projects requiring higher corrosion resistance, lower weight, or specific material performance.

Manufacturing & Customization

ViaWay Global supports both standard and custom flange nuts for B2B buyers. Customers can send drawings, samples, standard numbers, material requirements, thread specifications, surface finish requirements, or size lists for quotation.

Custom options include non-standard dimensions, special flange diameters, serrated or non-serrated faces, nylon insert designs, fine threads, left-hand threads, stainless steel passivation, polishing, and project-specific packaging. For stainless steel and special alloy flange nuts, we can support material confirmation, dimensional inspection, thread checking, and documentation according to order requirements.

For demanding environments, custom flange nuts can be produced in 316L, duplex stainless steel, titanium, nickel alloys, and other corrosion-resistant materials upon request.

Flange Nut Dimensions

Hexagon Flange Nuts Dimensions-DIN 6923

Thread Size	P（Pitch）			c	da		dc	dw	e	m		mw	s		r
D	Coarse thread	Fine thread 1	Fine thread 2	min	min	max	max	min	min	max	min	min	max=nominal size	min	max
M5	0.8	/	/	1	5	5.75	11.8	9.8	8.79	5	4.7	2.2	8	7.78	0.3
M6	1	/	/	1.1	6	6.75	14.2	12.2	11.05	6	5.7	3.1	10	9.78	0.36
M8	1.25	1	/	1.2	8	8.75	17.9	15.8	14.38	8	7.6	4.5	13	12.73	0.48
M10	1.5	1.25	-1	1.5	10	10.8	21.8	19.6	16.64	10	9.6	5.5	15	14.73	0.6
M12	1.75	1.5	-1.25	1.8	12	13	26	23.8	20.03	12	11.6	6.7	18	17.73	0.72
M14	2	1.5	/	2.1	14	15.1	29.9	27.6	23.36	14	13.3	7.8	21	20.67	0.88
M16	2	1.5	/	2.4	16	17.3	34.5	31.9	26.75	16	15.3	9	24	23.67	0.96
M20	2.5	1.5	/	3	20	21.6	42.8	39.9	32.95	20	18.9	11.1	30	29.67	1.2

Hex Flange Nuts Dimensions - ASME B 18.2.2 Table 13

Screw Thread d	d	PP		s		e		dc		m		c	m1
Screw Thread d	d	UNC	UNF	min	max	min	max	min	max	min	max	min	min
6#	0.138	32	40	0.302	0.312	0.342	0.361	0.406	0.422	0.156	0.171	0.02	0.1
8#	0.164	32	36	0.334	0.344	0.381	0.397	0.452	0.469	0.187	0.203	0.02	0.13
10#	0.19	24	32	0.365	0.375	0.416	0.433	0.48	0.5	0.203	0.219	0.03	0.13
12#	0.216	24	28	0.428	0.438	0.488	0.505	0.574	0.594	0.222	0.236	0.04	0.14
1/4	0.25	20	28	0.428	0.438	0.488	0.505	0.574	0.594	0.222	0.236	0.04	0.14
5/16	0.3125	18	24	0.489	0.5	0.557	0.577	0.66	0.68	0.268	0.283	0.04	0.17
3/8	0.375	16	24	0.551	0.562	0.628	0.65	0.728	0.75	0.33	0.347	0.04	0.23
7/16	0.4375	14	20	0.675	0.688	0.768	0.794	0.91	0.937	0.375	0.395	0.04	0.26
1/2	0.5	13	20	0.736	0.75	0.84	0.866	1	1.031	0.437	0.458	0.05	0.31
9/16	0.5625	12	18	0.861	0.875	0.982	1.01	1.155	1.188	0.483	0.506	0.05	0.35
5/8	0.625	11	18	0.922	0.938	1.051	1.083	1.248	1.281	0.545	0.569	0.05	0.4
3/4	0.75	10	16	1.088	1.125	1.24	1.299	1.46	1.5	0.627	0.675	0.06	0.46

Nylock Flange Nuts Dimensions - DIN 6926

Thread Size d	P			c	da		dc	dw	e	h		m	mw	s		r
Thread Size d	Pitch			c	da		dc	dw	e	h		m	mw	s		r
d	Coarse thread	Fine thread-1	Fine thread-2	min	min	max	max	min	min	max	min	min	min	max=nominal size	min	max
M5	0.8	/	/	1	5	5.75	11.8	9.8	8.79	7.1	6.74	4.7	2.2	8	7.78	0.3
M6	1	/	/	1.1	6	6.75	14.2	12.2	11.05	9.1	8.74	5.7	3.1	10	9.78	0.36
M8	1.25	1	/	1.2	8	8.75	17.9	15.8	14.38	11.1	10.67	7.6	4.5	13	12.73	0.48
M10	1.5	1.25	-1	1.5	10	10.8	21.8	19.6	16.64	13.5	13.07	9.6	5.5	15	14.73	0.6
M12	1.75	1.5	-1.25	1.8	12	13	26	23.8	20.03	16.1	15.67	11.6	6.7	18	17.73	0.72
(M14)	2	1.5	/	2.1	14	15.1	29.9	27.6	23.36	18.2	17.68	13.3	7.8	21	20.67	0.88
M16	2	1.5	/	2.4	16	17.3	34.5	31.9	26.75	20.3	19.46	15.3	9	24	23.67	0.96
M20	2.5	1.5	/	3	20	21.6	42.8	39.9	32.95	24.8	23.96	18.9	11.1	30	29.16	1.2

Need a Quote? Send What You Have

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

Standard or Drawing

DIN 6923, ISO 4161, EN 1661, ASME B18.2.2, DIN 6926, or custom drawing.

Size or Sample Photo

Metric or imperial thread size, pitch, flange diameter, serrated or non-serrated type, or a clear sample photo if you are not sure.

Material Preference

304/A2, 316/A4, 316L stainless steel, titanium, duplex stainless steel, nickel alloy, or other special materials. Carbon steel options are available on request.

Quantity & Application

Estimated quantity, packaging needs, target application, working environment, and any corrosion resistance or vibration resistance requirements.