DIN 6798 Lock Washers | McMaster-Carr

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DIN

DIN 6798

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Warning: Products have one, but not necessarily all, of the selected characteristics.

	System of Measurement System of Measurement

Metric

	For Screw Size For Screw Size

	Thickness Thickness

	Material Material

Stainless Steel

Steel

	Tooth Location Tooth Location

	External

	Washer Type Washer Type

Tooth Lock

Tight Grip

Countersunk

	OD OD

	ID ID

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

RoHS Compliant

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

REACH Compliant

	Hardness Hardness

Rockwell C35

Not Rated

	Finish Finish

Zinc Plated

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

DFARS Specialty Metals
COTS-Exempt

	Countersink Angle Countersink Angle

90°

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About Washers

The teeth on these washers bite further into the screw head and joint than standard external-tooth washers to provide a stronger hold. Use with fasteners that have heads large enough to make contact with the teeth, such as pan, button, and binding head screws.

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, mm	OD, mm	Thick., mm	Hardness	Specifications Met	Pkg. Qty.		Pkg.
M2	2.2	4.5	0.2-0.4	Not Rated	DIN 6798	100	000000000	00000
M2.5	2.7	5.5	0.3-0.5	Not Rated	DIN 6798	100	000000000	0000
M3	3.2	6.0	0.3-0.5	Not Rated	DIN 6798	100	000000000	0000
M4	4.3	8.0	0.4-0.6	Not Rated	DIN 6798	100	000000000	0000
M5	5.3	10.0	0.5-0.7	Not Rated	DIN 6798	100	000000000	0000
M6	6.4	11.0	0.6-0.8	Not Rated	DIN 6798	100	000000000	0000
M8	8.4	15.0	0.7-0.9	Not Rated	DIN 6798	100	000000000	0000
M10	10.5	18.0	0.8-1.0	Not Rated	DIN 6798	100	000000000	00000
M12	13.0	20.5	0.9-1.2	Not Rated	DIN 6798	50	000000000	0000
M16	17.0	26.0	1.0-1.4	Not Rated	DIN 6798	50	000000000	0000
M20	21.0	33.0	1.2-1.5	Not Rated	DIN 6798	10	000000000	0000
M24	25.0	38.0	1.4-1.6	Not Rated	DIN 6798	10	000000000	0000
Zinc-Plated Steel
M3	3.2	6.0	0.4-0.5	Rockwell C35	DIN 6798	100	000000000	0000
M4	4.3	8.0	0.5-0.6	Rockwell C35	DIN 6798	100	000000000	0000
M5	5.3	10.0	0.6-0.7	Rockwell C35	DIN 6798	100	000000000	0000
M6	6.4	11.0	0.7-0.8	Rockwell C35	DIN 6798	100	000000000	0000
M8	8.4	15.0	0.8-0.9	Rockwell C35	DIN 6798	100	000000000	0000
M10	10.5	18.0	0.9-1.0	Rockwell C35	DIN 6798	50	000000000	0000
M12	13.0	20.5	1.0-1.2	Rockwell C35	DIN 6798	50	000000000	0000

Countersunk Tight-Grip External-Tooth Lock Washers

To keep 90° countersunk screws from loosening in vibration applications, the teeth on these washers bite further into the screw head and joint than standard external-tooth lock washers for a more secure hold. Made of zinc-plated steel, these washers resist corrosion in wet environments. All meet DIN dimensional standards.

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

Zinc-Plated Steel
For Screw Size	ID, mm	OD, mm	Thickness, mm	Countersink Angle	Hardness	Specifications Met	Pkg. Qty.		Pkg.
M3	3.2	6.0	0.15-0.25	90°	Rockwell C35	DIN 6798	100	00000000	00000
M4	4.3	8.0	0.20-0.30	90°	Rockwell C35	DIN 6798	100	00000000	0000
M5	5.3	9.8	0.25-0.35	90°	Rockwell C35	DIN 6798	50	00000000	0000
M6	6.4	11.8	0.35-0.45	90°	Rockwell C35	DIN 6798	50	00000000	0000
M8	8.4	15.3	0.35-0.45	90°	Rockwell C35	DIN 6798	50	00000000	0000
M10	10.5	19.0	0.45-0.55	90°	Rockwell C35	DIN 6798	25	00000000	0000
M12	13.0	23.0	0.45-0.55	90°	Rockwell C35	DIN 6798	25	00000000	0000