Lock Washers

External Tooth Lock Washers

Sems screw in all types and all materials are also available!

Inch Sizes

Available in 410 Stainless, Silicone Bronze & Carbon Steel

Dimensions p/ANSI-ASME B18.21.1

Internal, External, Internal/External and Countersunk External

Size ranges from #2 to 1" (1/2" for countersunk)

Metric Sizes

Available in A2 (18-8), A4 (316) and Carbon Steel

Dimensions p/DIN 6797 and 6798

Internal and External

Size Ranges from 2mm to 30mm

See full dimensional data

	A		B		C
Nominal Washer Size	Inside Diameter		Outside Diameter		Thickness
	Max	Min	Max	Min	Max	Min
No. 3 (.099)	0.109	0.102	0.235	0.220	0.016	0.010
No. 4 ( .112)	0.123	0.115	0.260	0.245	0.018	0.012
No. 5 (.125)	0.136	0.129	0.285	0.270	0.020	0.014
No. 6 (.138)	0.150	0.141	0.320	0.305	0.022	0.016
No. 8 (.164)	0.176	0.168	0.381	0.365	0.023	0.018
No. 10 ( .190)	0.204	0.195	0.410	0.395	0.024	0.018
No. 12 (.216)	0.231	0.221	0.475	0.460	0.027	0.020
1/4 (.250)	0.267	0.256	0.510	0.494	0.028	0.023
5/16 (.3125)	0.332	0.320	0.610	0.588	0.034	0.028
3/8 (.375)	0.398	0.384	0.694	0.670	0.040	0.032
7/16 (.4375)	0.464	0.448	0.760	0.740	0.040	0.032
1/2 (.500)	0.530	0.513	0.900	0.880	0.045	0.037
9/16 (.5625)	0.596	0.576	0.985	0.960	0.045	0.037
5/8 (.625)	0.663	0.641	1.070	1.045	0.050	0.042
11/16 (.6875)	0.728	0.704	1.155	1.130	0.050	0.042
3/4 (.750)	0.795	0.768	1.260	1.220	0.055	0.047
13/16 (.8125)	0.861	0.833	1.315	1.290	0.055	0.047
7/8 (.875)	0.927	0.897	1.410	1.380	0.060	0.052
1	1.060	1.025	1.620	1.590	0.067	0.059

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High Collar

Sems screw in all types and all materials are also available!

Inch Sizes

Available in 18-8, 318, Brass, Bronze, Carbon Steel

Dimensions p/ANSI-ASME B18.21.1

Light, Medium (regular), High Collar and Heavy Split Lock

#2 diameter to 1.50"

Metric Sizes

Available in A2 (18-8), A4 (316) and Carbon Steel

Dimensions p/DIN 127

Size Ranges from 2mm to 24mm

See full dimensional data

	A		B	W	BW
Nominal Washer Size	Inside Diameter		Outside Diameter	Section Width	Bearing Width
	Max	Min	Max	Min	Min
No. 4 ( .112)	0.120	0.114	0.173	0.022	0.015
No. 5 (.125)	0.133	0.127	0.202	0.030	0.021
No. 6 (.138)	0.148	0.141	0.216	0.030	0.021
No. 8 (.164)	0.174	0.167	0.267	0.042	0.029
No. 10 ( .190)	0.200	0.193	0.294	0.042	0.029
1/4 (.250)	0.260	0.252	0.363	0.047	0.033
5/16 (.3125)	0.322	0.314	0.457	0.062	0.043
3/8 (.375)	0.385	0.377	0.550	0.076	0.053
7/16 (.4375)	0.450	0.440	0.644	0.090	0.063
1/2 (.500)	0.512	0.502	0.733	0.103	0.072
5/8 (.625)	0.641	0.628	0.917	0.125	0.087
3/4 (.750)	0.766	0.753	1.105	0.154	0.108
7/8 (.875)	0.894	0.878	1.291	0.182	0.127
1	1.024	1.003	1.478	0.208	0.146

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Internal Tooth Lock Washers

Sems screw in all types and all materials are also available! We are unable to list all of our stock items. If you don't see what you are looking for please contact us!

Inch Sizes

Available in 410 Stainless, Silicone Bronze & Carbon Steel

Dimensions p/ANSI-ASME B18.21.1

Internal, External, Internal/External and Countersunk External

Size ranges from #2 to 1" (1/2" for countersunk)

Metric Sizes

Available in A2 (18-8), A4 (316) and Carbon Steel

Dimensions p/DIN 6797 and 6798

Internal and External

Size Ranges from 2mm to 30mm

See full dimensional data

	A		B		C
Nominal Washer Size	Inside Diameter		Outside Diameter		Thickness
	Max	Min	Max	Min	Max	Min
No. 2 (.086)	0.095	0.089	0.200	0.175	0.016	0.010
No. 3 (.099)	0.109	0.102	0.232	0.215	0.016	0.010
No. 4 ( .112)	0.123	0.115	0.270	0.245	0.018	0.012
No. 5 (.125)	0.136	0.129	0.280	0.255	0.020	0.014
No. 6 (.138)	0.150	0.141	0.295	0.275	0.022	0.016
No. 8 (.164)	0.176	0.168	0.340	0.325	0.023	0.018
No. 10 ( .190)	0.204	0.195	0.381	0.365	0.024	0.018
No. 12 (.216)	0.231	0.221	0.410	0.394	0.027	0.020
1/4 (.250)	0.267	0.256	0.478	0.460	0.028	0.023
5/16 (.3125)	0.332	0.320	0.610	0.594	0.034	0.028
3/8 (.375)	0.398	0.384	0.692	0.670	0.040	0.032
7/16 (.4375)	0.464	0.448	0.789	0.740	0.040	0.032
1/2 (.500)	0.530	0.512	0.900	0.867	0.045	0.037
9/16 (.5625)	0.596	0.576	0.985	0.957	0.045	0.037
5/8 (.625)	0.663	0.640	1.071	1.045	0.050	0.042
11/16 (.6875)	0.728	0.704	1.166	1.130	0.050	0.042
3/4 (.750)	0.795	0.769	1.245	1.220	0.055	0.047
13/16 (.8125)	0.861	0.832	1.315	1.290	0.055	0.047
7/8 (.875)	0.927	0.894	1.410	1.364	0.060	0.052
1	1.060	1.019	1.637	1.590	0.067	0.059

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Split Lock

Sems screw in all types and all materials are also available!

Inch Sizes

Available in 18-8, 318, Brass, Bronze, Carbon Steel

Dimensions p/ANSI-ASME B18.21.1

Light, Medium (regular), High Collar and Heavy Split Lock

#2 diameter to 1.50"

Metric Sizes

Available in A2 (18-8), A4 (316) and Carbon Steel

Dimensions p/DIN 127

Size Ranges from 2mm to 24mm

See full dimensional data

	A		B	W	BW
Nominal Washer Size	Inside Diameter		Outside Diameter	Section Width	Bearing Width
	Max	Min	Max	Min	Min
No. 2 (.086)	0.094	0.088	0.172	0.035	0.024
No. 3 (.099)	0.107	0.101	0.195	0.040	0.028
No. 4 ( .112)	0.120	0.114	0.209	0.040	0.028
No. 5 (.125)	0.133	0.127	0.236	0.047	0.033
No. 6 (.138)	0.148	0.141	0.250	0.047	0.033
No. 8 (.164)	0.174	0.167	0.293	0.055	0.038
No. 10 ( .190)	0.200	0.193	0.334	0.062	0.043
No. 12 (.216)	0.227	0.220	0.377	0.070	0.049
1/4 (.250)	0.260	0.252	0.487	0.109	0.076
5/16 (.3125)	0.322	0.314	0.583	0.125	0.087
3/8 (.375)	0.385	0.377	0.680	0.141	0.099
7/16 (.4375)	0.450	0.440	0.776	0.156	0.109
1/2 (.500)	0.512	0.502	0.869	0.171	0.120
9/16 (.5625)	0.574	0.564	0.965	0.188	0.132
5/8 (.625)	0.641	0.628	1.073	0.203	0.142
11/16 (.6875)	0.704	0.691	1.170	0.219	0.153
3/4 (.750)	0.766	0.753	1.265	0.234	0.164
13/16 (.8125)	0.832	0.816	1.363	0.250	0.175
7/8 (.875)	0.894	0.878	1.459	0.266	0.186
15/16 (.9375)	0.958	0.941	1.556	0.281	0.197
1	1.024	1.003	1.656	0.297	0.208

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AN, MS, NAS, NASM Lock Washers

NASM parts are available when the AN/MS/NAS number has been cancelled or superseded.

AN935

AN936

MS14183

MS20002

MS21299

MS35333 (stock)

MS35335 (stock)

MS35336 (stock)

MS35338 (stock)

MS35339

MS122026 – MS122075

NAS1587

NAS1676

DFAR compliant and full certifications are available.

Off the shelf in 18-8, 316, Grade 5 & 8, brass, bronze and other materials.

External Tooth Lock Washers

High Collar

Internal Tooth Lock Washers

Split Lock

AN, MS, NAS, NASM Lock Washers

Retaining Rings, Groove Pins, Spring Pins, we are much more than threaded product!

Lock Washers

Off the shelf in 18-8, 316, Grade 5 & 8, brass, bronze and other materials.

External Tooth Lock Washers

External Tooth Lock Washers Dimensional Data

High Collar

High Collar Dimensional Data

Internal Tooth Lock Washers

Internal Tooth Lock Washers Dimensional Data

Split Lock

Split Lock Dimensional Data

AN, MS, NAS, NASM Lock Washers

Retaining Rings, Groove Pins, Spring Pins, we are much more than threaded product!