Metric Internal Tooth Lock Washers

	System of Measurement System of Measurement

Metric

	For Screw Size For Screw Size

M2.3

	Tooth Location Tooth Location

	Internal

	Material Material

Stainless Steel

Steel

	Finish Finish

Black Oxide

Zinc Plated

	OD OD

	ID ID

	Washer Type Washer Type

	Tooth Lock

	Thickness Thickness

	Hardness Hardness

Rockwell C35

Rockwell C42

Not Rated

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

RoHS Compliant

	Specifications Met Specifications Met

DIN

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

REACH Compliant

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

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

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49 Products

About Washers

Internal teeth dig into the screw head while the smooth outside edge won't snag objects. These washers provide greater vibration resistance than split lock washers. Use with fasteners that have small heads, such as fillister and cheese head screws.

Black-oxide steel washers are mildly corrosion resistant in dry environments.

Zinc-plated steel washers resist corrosion in wet environments.

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

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

Black-Oxide Steel
For Screw Size	ID, mm	OD, mm	Thick., mm	Hardness	Specifications Met	Pkg. Qty.		Pkg.
M2	2.2	4.5	0.2-0.4	Rockwell C35	DIN 6797	100	000000000	00000
M2.5	2.7	5.5	0.2-0.5	Rockwell C35	DIN 6797	100	000000000	0000
M2.6	2.8	5.5	0.3-0.5	Rockwell C35	DIN 6797	100	000000000	0000
M3	3.2	6.0	0.3-0.5	Rockwell C35	DIN 6797	100	000000000	0000
M3.5	3.7	7.0	0.4-0.6	Rockwell C35	DIN 6797	100	000000000	0000
M4	4.3	8.0	0.4-0.6	Rockwell C35	DIN 6797	100	000000000	0000
M5	5.3	10.0	0.5-0.7	Rockwell C35	DIN 6797	100	000000000	0000
M6	6.4	11.0	0.6-0.8	Rockwell C35	DIN 6797	100	000000000	0000
M8	8.4	15.0	0.7-0.9	Rockwell C35	DIN 6797	100	000000000	0000
M10	10.5	18.0	0.8-1.0	Rockwell C35	DIN 6797	50	000000000	0000
M12	13.0	20.5	0.9-1.2	Rockwell C35	DIN 6797	50	000000000	0000
M14	15.0	24.0	0.9-1.2	Rockwell C35	DIN 6797	25	000000000	0000
M16	17.0	26.0	1.0-1.4	Rockwell C35	DIN 6797	25	000000000	0000
M18	19.0	30.0	1.2-1.5	Rockwell C35	DIN 6797	10	000000000	0000
M20	21.0	33.0	1.2-1.5	Rockwell C35	DIN 6797	10	000000000	00000
Zinc-Plated Steel
M2	2.2	4.5	0.2-0.4	Rockwell C42	DIN 6797	100	000000000	0000
M2.5	2.7	5.5	0.2-0.5	Rockwell C42	DIN 6797	100	000000000	0000
M3	3.2	6.0	0.3-0.5	Rockwell C42	DIN 6797	100	000000000	0000
M3.5	3.7	7.0	0.4-0.6	Rockwell C42	DIN 6797	100	000000000	0000
M4	4.3	8.0	0.4-0.6	Rockwell C42	DIN 6797	100	000000000	0000
M5	5.3	10.0	0.5-0.7	Rockwell C42	DIN 6797	100	000000000	0000
M6	6.4	11.0	0.6-0.8	Rockwell C42	DIN 6797	100	000000000	0000
M7	7.4	12.5	0.7-0.9	Rockwell C42	DIN 6797	100	000000000	0000
M8	8.4	15.0	0.7-0.9	Rockwell C42	DIN 6797	100	000000000	0000
M10	10.5	18.0	0.8-1.0	Rockwell C42	DIN 6797	50	000000000	0000
M12	13.0	20.5	0.9-1.2	Rockwell C42	DIN 6797	50	000000000	00000
M14	15.0	24.0	0.9-1.2	Rockwell C42	DIN 6797	25	000000000	0000
M16	17.0	26.0	1.0-1.4	Rockwell C42	DIN 6797	25	000000000	0000
M18	19.0	30.0	1.2-1.5	Rockwell C42	DIN 6797	10	000000000	0000
M20	21.0	33.0	1.2-1.5	Rockwell C42	DIN 6797	10	000000000	00000
M24	25.0	38.0	1.3-1.6	Rockwell C42	DIN 6797	10	000000000	00000
18-8 Stainless Steel
M2	2.2	4.5	0.2-0.4	Not Rated	DIN 6797	100	000000000	0000
M2.3	2.5	5.0	0.2-0.4	Not Rated	DIN 6797	100	000000000	0000
M2.5	2.7	5.5	0.2-0.5	Not Rated	DIN 6797	100	000000000	0000
M3	3.2	6.0	0.3-0.5	Not Rated	DIN 6797	100	000000000	0000
M3.5	3.7	7.0	0.4-0.6	Not Rated	DIN 6797	100	000000000	0000
M4	4.3	8.0	0.4-0.6	Not Rated	DIN 6797	100	000000000	0000
M5	5.3	10.0	0.5-0.7	Not Rated	DIN 6797	100	000000000	0000
M6	6.4	11.0	0.6-0.8	Not Rated	DIN 6797	100	000000000	0000
M7	7.4	12.5	0.7-0.9	Not Rated	DIN 6797	50	000000000	00000
M8	8.4	15.0	0.7-0.9	Not Rated	DIN 6797	100	000000000	0000
M10	10.5	18.0	0.8-1.0	Not Rated	DIN 6797	50	000000000	0000
M12	13.0	20.5	0.9-1.2	Not Rated	DIN 6797	50	000000000	0000
M14	15.0	24.0	0.9-1.2	Not Rated	DIN 6797	25	000000000	0000
M16	17.0	26.0	1.0-1.4	Not Rated	DIN 6797	25	000000000	0000
M18	19.0	30.0	1.2-1.5	Not Rated	DIN 6797	10	000000000	0000
M20	21.0	33.0	1.2-1.5	Not Rated	DIN 6797	10	000000000	0000
M22	23.0	36.0	1.3-1.6	Not Rated	DIN 6797	10	000000000	0000
M24	25.0	38.0	1.3-1.6	Not Rated	DIN 6797	10	000000000	00000

About Washers

Metric Internal-Tooth Lock Washers