helical spring lock washer side view showing split ends

316 stainless steel split lock washer for corrosion resistant fastening

stainless steel spring washers in different metric sizes

304 stainless steel DIN 127B spring washer

Stainless Steel Spring Washers / Split Lock Washers

Spring washers, also known as split lock washers or helical lock washers, are designed to provide additional spring tension in bolted assemblies and help reduce loosening caused by vibration or dynamic load.

ViaWay Global supplies spring washers in 304/A2, 316/A4, 316L stainless steel, carbon steel, alloy steel, and selected special alloys. Standard options include DIN 127 Form A / Form B, DIN 7980, DIN 128, ASME B18.21.1, and BS 4464, with metric and imperial sizes available for industrial B2B applications.

Product Specifications

Size (Nominal):
- Metric: M2 to M64
- Imperial: #4 to 3″ inch
Material:
- Stainless Steel: 304/A2, 316/A4, 316L, 310S
- Special Alloys: Duplex 2205 / 2507, titanium, Inconel, Monel, Hastelloy, A286, and other project-specific materials
- Carbon & Alloy Steel: Spring steel, 65Mn, 70#, alloy steel, available on request
Standards:
- Metric: DIN 127 (Form A / Form B), DIN 7980 (For socket head screws), DIN 128.
- Imperial / British: ASME B18.21.1, BS 4464.
- Custom Standards: Available according to drawing, sample, or project requirements
Surface Finish:
- Stainless/Alloys: Plain, Passivated.
- Carbon Steel: Black Oxide, Zinc Plated, Hot Dip Galvanized (HDG), PTFE Coated.
Washer Type:
- Single coil spring washers
- Split lock washers
- Helical spring lock washers
- DIN 127B spring washers
- Regular and heavy series ASME helical spring lock washers

Applications

Spring washers are commonly used in bolted joints that require additional spring tension and resistance to loosening under vibration, shock, or dynamic load. Typical applications include machinery assembly, electrical equipment, pump and valve assemblies, automotive components, rail and industrial fixtures, outdoor equipment, and general maintenance fastening.

For humid, outdoor, marine, or corrosion-prone environments, 304 and 316 stainless steel spring washers are recommended. For high-load or project-specific applications, we can supply heavy-duty series, alloy steel, duplex stainless steel, titanium, nickel alloy, and other special material options based on the required standard and working environment.

Manufacturing & Customization

ViaWay Global supplies both standard and custom spring washers for industrial B2B buyers. Customers can send standard numbers, drawings, samples, size lists, material requirements, surface finish requirements, or application details for quotation.

Custom options include non-standard sizes, special materials, heavy-duty series, specified surface treatments, project packaging, and bulk order supply. For stainless steel and special alloy spring washers, we can support material confirmation, dimensional inspection, surface checking, and documentation according to order requirements.

Key dimensions such as inner diameter, outer diameter, section thickness, free height, gap, and surface condition can be checked according to the applicable standard or customer drawing.

Spring Lock Washers Dimensions

Spring Washer Dimensions-DIN 127B

Nominal Diameter	d		n			h			H		per 1000 units ≈ kg
Nominal Diameter	min	max	Nominal Size	max	min	Nominal Size	max	min	min	max	per 1000 units ≈ kg
Φ2	2.1	2.4	0.9	1	0.8	0.5	0.6	0.4	1	1.2	0.033
Φ2.2	2.3	2.6	1	1.1	0.9	0.6	0.7	0.5	1.2	1.4	0.05
Φ2.5	2.6	2.9	1	1.1	0.9	0.6	0.7	0.5	1.2	1.4	0.053
Φ3	3.1	3.4	1.3	1.4	1.2	0.8	0.9	0.7	1.6	1.9	0.11
Φ3.5	3.6	3.9	1.3	1.4	1.2	0.8	0.9	0.7	1.6	1.9	0.12
Φ4	4.1	4.4	1.5	1.6	1.4	0.9	1	0.8	1.8	2.1	0.18
Φ5	5.1	5.4	1.8	1.9	1.7	1.2	1.3	1.1	2.4	2.8	0.36
Φ6	6.1	6.5	2.5	2.65	2.35	1.6	1.7	1.5	3.2	3.8	0.83
Φ7	7.1	7.5	2.5	2.65	2.35	1.6	1.7	1.5	3.2	3.8	0.93
Φ8	8.1	8.5	3	3.15	2.85	2	2.1	1.9	4	4.7	1.6
Φ10	10.2	10.7	3.5	3.7	3.3	2.2	2.35	2.05	4.4	5.2	2.53
Φ12	12.2	12.7	4	4.2	3.8	2.5	2.65	2.35	5	5.9	3.82
Φ14	14.2	14.7	4.5	4.7	4.3	3	3.15	2.85	6	7.1	6.01
Φ16	16.2	17	5	5.2	4.8	3.5	3.7	3.3	7	8.3	8.91
Φ18	18.2	19	5	5.2	4.8	3.5	3.7	3.3	7	8.3	9.73
Φ20	20.2	21.2	6	6.2	5.8	4	4.2	3.8	8	9.4	15.2
Φ22	22.5	23.5	6	6.2	5.8	4	4.2	3.8	8	9.4	16.5
Φ24	24.5	25.5	7	7.25	6.75	5	5.2	4.8	10	11.8	26.2
Φ27	27.5	28.5	7	7.25	6.75	5	5.2	4.8	10	11.8	28.7
Φ30	30.5	31.7	8	8.25	7.75	6	6.2	5.8	12	14.2	44.3
Φ36	36.5	37.7	10	10.25	9.75	6	6.2	5.8	12	14.2	67.3
Φ39	39.5	40.7	10	10.25	9.75	6	6.2	5.8	12	14.2	71.7
Φ42	42.5	43.7	12	12.25	11.75	7	7.25	6.75	14	16.5	111
Φ45	45.5	46.7	12	12.25	11.75	7	7.25	6.75	14	16.5	117
Φ48	49	50.5	12	12.25	11.75	7	7.25	6.75	14	16.5	123
Φ52	53	54.5	14	14.25	13.75	8	8.25	7.75	16	18.9	182
Φ56	57	58.5	14	14.25	13.75	8	8.25	7.75	16	18.9	193
Φ60	61	62.5	14	14.25	13.75	8	8.25	7.75	16	18.9	203
Φ64	65	66.5	14	14.25	13.75	8	8.25	7.75	16	18.9	218
Φ68	69	70.5	14	14.25	13.75	8	8.25	7.75	16	18.9	228
Φ72	73	74.5	14	14.25	13.75	8	8.25	7.75	16	18.9	240
Φ80	81	82.5	14	14.25	13.75	8	8.25	7.75	16	18.9	262
Φ90	91	92.5	14	14.25	13.75	8	8.25	7.75	16	18.9	290
Φ100	101	102.5	14	14.25	13.75	8	8.25	7.75	16	18.9	318

Regular Helical Spring-Lock Washers ASME B 18.21.1 (T1) Dimensions

Size	d		dc	h	n	n1
Size	max	min	max	min	min	min
2#	0.094	0.088	0.172	0.02	0.035	0.024
3#	0.107	0.101	0.195	0.025	0.04	0.028
4#	0.12	0.114	0.209	0.025	0.04	0.028
5#	0.133	0.127	0.236	0.031	0.047	0.033
6#	0.148	0.141	0.25	0.031	0.047	0.033
8#	0.174	0.167	0.293	0.04	0.055	0.038
10#	0.2	0.193	0.334	0.047	0.062	0.043
12#	0.227	0.22	0.377	0.056	0.07	0.049
1/4	0.26	0.252	0.487	0.062	0.109	0.076
5/16	0.322	0.314	0.583	0.078	0.125	0.087
3/8	0.385	0.377	0.68	0.094	0.141	0.099
7/16	0.45	0.44	0.776	0.109	0.156	0.109
1/2	0.512	0.502	0.869	0.125	0.171	0.12
9/16	0.574	0.564	0.965	0.141	0.188	0.132
5/8	0.641	0.628	1.073	0.156	0.203	0.142
11/16	0.704	0.691	1.17	0.172	0.219	0.153
3/4	0.766	0.753	1.265	0.188	0.234	0.164
13/16	0.832	0.816	1.363	0.203	0.25	0.175
7/8	0.894	0.878	1.459	0.219	0.266	0.186
15/16	0.958	0.941	1.556	0.234	0.281	0.197
1	1.024	1.003	1.656	0.25	0.297	0.208
1-1/16	1.087	1.066	1.751	0.266	0.312	0.218
1-1/8	1.153	1.129	1.847	0.281	0.328	0.23
1-3/16	1.217	1.192	1.943	0.297	0.344	0.241
1-1/4	1.28	1.254	2.036	0.312	0.359	0.251
1-5/16	1.344	1.317	2.133	0.328	0.375	0.262
1-3/8	1.408	1.379	2.219	0.344	0.391	0.274
1-7/16	1.472	1.442	2.324	0.359	0.406	0.284
1-1/2	1.534	1.504	2.419	0.375	0.422	0.295
1-5/8	1.663	1.633	2.553	0.389	0.424	0.297
1-3/4	1.789	1.758	2.679	0.389	0.424	0.297
1-7/8	1.914	1.883	2.811	0.422	0.427	0.299
2	2.039	2.008	2.936	0.422	0.427	0.299
2-1/4	2.293	2.262	3.221	0.44	0.442	0.309
2-1/2	2.543	2.512	3.471	0.44	0.442	0.309
2-3/4	2.793	2.762	3.824	0.458	0.491	0.344
3	3.043	3.012	4.074	0.458	0.491	0.344

Heavy Helical Spring-Lock Washers ASME B 18.21.1 (T2)

Size	d		dc	h	n	n1
Size	max	min	max	min	min	min
2#	0.094	0.088	0.182	0.025	0.04	0.028
3#	0.107	0.101	0.209	0.031	0.047	0.033
4#	0.12	0.114	0.223	0.031	0.047	0.033
5#	0.133	0.127	0.252	0.04	0.055	0.038
6#	0.148	0.141	0.266	0.04	0.055	0.038
8#	0.174	0.167	0.307	0.047	0.062	0.043
10#	0.2	0.193	0.35	0.056	0.07	0.049
12#	0.227	0.22	0.391	0.063	0.077	0.054
1/4	0.26	0.252	0.489	0.077	0.11	0.077
5/16	0.322	0.314	0.593	0.097	0.13	0.091
3/8	0.385	0.377	0.688	0.115	0.145	0.101
7/16	0.45	0.44	0.784	0.133	0.16	0.112
1/2	0.512	0.502	0.879	0.151	0.176	0.123
9/16	0.574	0.564	0.975	0.17	0.193	0.135
5/8	0.641	0.628	1.087	0.189	0.21	0.147
11/16	0.704	0.691	1.186	0.207	0.227	0.159
3/4	0.766	0.753	1.285	0.226	0.244	0.171
13/16	0.832	0.816	1.387	0.246	0.262	0.183
7/8	0.894	0.878	1.489	0.266	0.281	0.197
15/16	0.958	0.941	1.59	0.284	0.298	0.209
1	1.024	1.003	1.7	0.306	0.319	0.223
1-1/16	1.087	1.066	1.803	0.326	0.338	0.237
1-1/8	1.153	1.129	1.903	0.345	0.356	0.249
1-3/16	1.217	1.192	2.001	0.364	0.373	0.261
1-1/4	1.28	1.254	2.104	0.384	0.393	0.275
1-5/16	1.344	1.317	2.203	0.403	0.41	0.287
1-3/8	1.408	1.379	2.301	0.422	0.427	0.299
1-7/16	1.472	1.442	2.396	0.44	0.442	0.309
1-1/2	1.534	1.504	2.491	0.458	0.458	0.321
1-5/8	1.663	1.633	2.694	0.458	0.491	0.344
1-3/4	1.789	1.758	2.82	0.458	0.491	0.344
1-7/8	1.914	1.883	2.945	0.458	0.491	0.344
2	2.039	2.008	3.144	0.496	0.526	0.368
2-1/4	2.293	2.262	3.398	0.496	0.526	0.368
2-1/2	2.543	2.512	3.648	0.496	0.526	0.368
2-3/4	2.793	2.762	3.91	0.526	0.532	0.372
3	3.043	3.012	4.16	0.526	0.532	0.372

Need a Quote? Send What You Have

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

Standard or Drawing

DIN 127 Form A / Form B, DIN 7980, DIN 128, ASME B18.21.1, BS 4464, or custom drawing.

Size or Sample Photo

Metric size, imperial size, inner diameter, outer diameter, thickness, free height, or a clear sample photo if you are not sure.

Material Preference

304/A2, 316/A4, 316L stainless steel, spring steel, alloy steel, duplex stainless steel, titanium, Inconel, Monel, Hastelloy, or other special materials.

Quantity & Application

Estimated quantity, packaging needs, working environment, and where the washers will be used, such as machinery, electrical equipment, outdoor assembly, marine use, or high-vibration applications.