Tab Lock Washers | McMaster-Carr

	Material Material

Stainless Steel

Steel

	Finish Finish

Zinc Plated

	System of Measurement System of Measurement

Inch

	For Screw Size For Screw Size

	Thickness Thickness

	Length Length

	ID ID

	OD OD

	Washer Type Washer Type

	Tab Lock

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Hardness Hardness

Not Rated

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

26 Products

About Washers

Bend one tab against the side of the mounting surface and the other tab against the flats on a bolt or nut to prevent both the fastener and washer from turning and loosening in high-vibration applications, such as a motor mount.

18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.

Zinc-plated steel washers are corrosion resistant in wet environments.

For technical drawings and 3-D models, click on a part number.

18-8 Stainless Steel
For Screw Size	ID	OD	Overall Lg.	Thick.		Each
No. 10	0.204"	0.625"	1 1/4"	0.036"	0000000	00000
1/4"	0.281"	0.75"	1 3/8"	0.036"	0000000	0000
5/16"	0.343"	0.75"	1 3/16"	0.036"	0000000	0000
3/8"	0.406"	0.875"	1 9/16"	0.062"	0000000	0000
7/16"	0.500"	1.125"	1 13/16"	0.062"	0000000	0000
1/2"	0.531"	1.125"	1 9/16"	0.062"	0000000	0000
9/16"	0.595"	1.125"	1 7/8"	0.062"	0000000	0000
5/8"	0.656"	1.25"	2"	0.062"	0000000	0000
3/4"	0.781"	1.5"	2 3/8"	0.062"	0000000	0000
7/8"	0.910"	1.75"	2 5/8"	0.062"	0000000	0000
1"	1.031"	2"	3"	0.094"	0000000	00000
1 1/4"	1.281"	2.5"	3 1/4"	0.125"	0000000	00000
1 1/2"	1.531"	3"	4"	0.125"	0000000	00000
Zinc-Plated Steel
No. 10	0.204"	0.625"	1 1/4"	0.036"	0000000	0000
1/4"	0.281"	0.75"	1 3/8"	0.036"	0000000	0000
5/16"	0.343"	0.75"	1 3/16"	0.036"	0000000	0000
3/8"	0.406"	0.875"	1 9/16"	0.063"	0000000	0000
7/16"	0.500"	1.125"	1 13/16"	0.062"	0000000	0000
1/2"	0.531"	1.125"	1 9/16"	0.063"	0000000	0000
9/16"	0.595"	1.125"	1 7/8"	0.062"	0000000	0000
5/8"	0.656"	1.25"	2"	0.062"	0000000	0000
3/4"	0.781"	1.5"	2 3/8"	0.063"	0000000	0000
7/8"	0.910"	1.75"	2 5/8"	0.062"	0000000	0000
1"	1.031"	2"	3"	0.094"	0000000	0000
1 1/4"	1.281"	2.5"	3 1/4"	0.125"	0000000	0000
1 1/2"	1.531"	3"	4"	0.125"	0000000	0000