Metal Sealing Washers | McMaster-Carr

	System of Measurement System of Measurement

Metric

	ID ID

	OD OD

	For Screw Size For Screw Size

	Material Material

Aluminum

Copper

	Thickness Thickness

0.8 to 1.2 mm

1.3 to 1.7 mm

1.8 to 2.2 mm

	Washer Type Washer Type

	Flat

	Specifications Met Specifications Met

DIN

	Hardness Hardness

Not Rated

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

DFARS Specialty Metals
COTS-Exempt

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

RoHS Compliant

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57 Products

About Washers

Also known as crush washers, these compress when tightened to form a tighter, more durable seal than rubber washers. They are commonly used to seal fluids such as oil and fuel. Washers are not reusable.

Copper washers are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.

Aluminum washers are lightweight and corrosion resistant in wet environments.

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

Copper
For Screw Size	ID, mm	OD, mm	Thick., mm	Specifications Met	Pkg. Qty.		Pkg.
M5	5.2	10.4	0.8-1.2	DIN 7603	25	000000000	000000
M6	6.2	9.9	0.8-1.2	DIN 7603	25	000000000	00000
M6	6.2	11.9	0.8-1.2	DIN 7603	25	000000000	0000
M6	6.2	12.4	1.3-1.7	DIN 7603	25	000000000	00000
M8	8.2	11.9	0.8-1.2	DIN 7603	25	000000000	00000
M8	8.2	12.4	1.3-1.7	DIN 7603	25	000000000	00000
M8	8.2	13.9	0.8-1.2	DIN 7603	25	000000000	00000
M10	10.2	13.9	0.8-1.2	DIN 7603	25	000000000	00000
M10	10.2	13.9	1.3-1.7	DIN 7603	10	000000000	0000
M10	10.2	15.9	1.3-1.7	DIN 7603	25	000000000	00000
M12	12.2	15.9	1.3-1.7	DIN 7603	25	000000000	00000
M12	12.2	16.2	0.8-1.2	DIN 7603	25	000000000	00000
M12	12.2	17.9	1.3-1.7	DIN 7603	25	000000000	00000
M14	14.2	17.9	0.8-1.2	DIN 7603	10	000000000	00000
M14	14.2	17.9	1.3-1.7	DIN 7603	10	000000000	00000
M14	14.2	19.9	1.3-1.7	DIN 7603	10	000000000	00000
M16	16.2	19.9	1.3-1.7	DIN 7603	10	000000000	00000
M16	16.2	21.9	1.3-1.7	DIN 7603	10	000000000	00000
M16	16.2	21.9	1.8-2.2	DIN 7603	10	000000000	00000
M18	18.2	21.9	1.3-1.7	DIN 7603	5	000000000	0000
M18	18.2	23.9	1.3-1.7	DIN 7603	10	000000000	00000
M20	20.2	23.9	1.3-1.7	DIN 7603	5	000000000	0000
M20	20.2	25.9	1.3-1.7	DIN 7603	5	000000000	00000
M22	22.2	26.9	1.3-1.7	DIN 7603	5	000000000	00000
M22	22.2	28.9	1.3-1.7	DIN 7603	5	000000000	00000
M24	24.3	29.9	1.8-2.2	DIN 7603	5	000000000	00000
M26	26.3	31.9	1.8-2.2	DIN 7603	5	000000000	00000
M28	28.3	35.9	1.3-1.7	DIN 7603	5	000000000	00000
M30	30.3	35.9	1.8-2.2	DIN 7603	5	000000000	00000
M32	32.3	37.9	1.8-2.2	DIN 7603	5	000000000	00000
M36	36.3	41.9	1.8-2.2	DIN 7603	5	000000000	00000
M36	36.3	43.9	1.8-2.2	DIN 7603	1	000000000	00000
M38	38.3	43.9	1.8-2.2	DIN 7603	1	000000000	00000
M42	42.3	48.9	1.8-2.2	DIN 7603	1	000000000	00000
M48	48.3	54.9	1.8-2.2	DIN 7603	1	000000000	00000
Aluminum
M6	6.2	9.9	0.8-1.2	DIN 7603	50	000000000	00000
M6	6.2	11.9	0.8-1.2	DIN 7603	50	000000000	00000
M8	8.2	11.9	0.8-1.2	DIN 7603	50	000000000	00000
M8	8.2	13.9	0.8-1.2	DIN 7603	10	000000000	0000
M10	10.2	13.9	0.8-1.2	DIN 7603	50	000000000	00000
M10	10.2	13.9	1.3-1.7	DIN 7603	10	000000000	0000
M10	10.2	15.9	0.8-1.2	DIN 7603	50	000000000	00000
M10	10.2	15.9	1.3-1.7	DIN 7603	10	000000000	0000
M12	12.2	15.9	1.3-1.7	DIN 7603	50	000000000	00000
M12	12.2	17.9	1.3-1.7	DIN 7603	50	000000000	00000
M14	14.2	17.9	1.3-1.7	DIN 7603	25	000000000	00000
M14	14.2	19.9	1.3-1.7	DIN 7603	25	000000000	00000
M16	16.2	19.9	1.3-1.7	DIN 7603	25	000000000	00000
M16	16.2	21.9	1.3-1.7	DIN 7603	10	000000000	00000
M18	18.2	21.9	1.3-1.7	DIN 7603	5	000000000	0000
M18	18.2	23.9	1.3-1.7	DIN 7603	10	000000000	00000
M20	20.2	23.9	1.3-1.7	DIN 7603	5	000000000	0000
M20	20.2	25.9	1.3-1.7	DIN 7603	10	000000000	00000
M22	22.2	26.9	1.3-1.7	DIN 7603	10	000000000	00000
M24	24.3	29.9	1.8-2.2	DIN 7603	10	000000000	00000
M24	24.3	31.9	1.8-2.2	DIN 7603	5	000000000	0000
M26	26.3	31.9	1.8-2.2	DIN 7603	10	000000000	00000