Crush Washers | McMaster-Carr

	System of Measurement System of Measurement

Metric

Inch

	ID ID

	OD OD

	Material Material

Copper

Aluminum

Brass

	For Screw Size For Screw Size

	Thickness Thickness

	Specifications Met Specifications Met

DIN

ASTM

	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

RoHS Compliant with
Exemptions

	Minimum Hardness Minimum Hardness

Rockwell B60

Not Rated

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

REACH Compliant

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133 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

Ring Shims

Precisely align, level, and adjust spacing on fasteners, shafts, and machinery with these shims.

For accurate leveling, choose materials such as steel or stainless steel, which are hard enough to resist scratching and deforming. Softer shims, like copper or aluminum, can be used as wear plates between components that rub together, preventing damage to equipment.

Aluminum shims are lightweight and nonmagnetic. They have good corrosion resistance.

Brass and copper shims are corrosion resistant and nonmagnetic.

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

1100 Aluminum

0.005" Thick. (-0.0005" to 0.0005" Tolerance)
ID	ID Tolerance	OD	OD Tolerance	Material	Min. Hardness	Pkg. Qty.		Pkg.
3/8"	0" to 0.011"	5/8"	-0.002" to 0.002"	1100 Aluminum	Not Rated	10	000000000	000000
1/2"	0" to 0.011"	3/4"	-0.002" to 0.002"	1100 Aluminum	Not Rated	10	000000000	00000
5/8"	0" to 0.011"	1"	-0.002" to 0.002"	1100 Aluminum	Not Rated	10	000000000	00000
3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	1100 Aluminum	Not Rated	5	000000000	00000
0.01" Thick. (-0.001" to 0.001" Tolerance)
3/8"	0" to 0.011"	5/8"	-0.002" to 0.002"	1100 Aluminum	Not Rated	10	000000000	00000
1/2"	0" to 0.011"	3/4"	-0.002" to 0.002"	1100 Aluminum	Not Rated	10	000000000	00000
5/8"	0" to 0.011"	1"	-0.002" to 0.002"	1100 Aluminum	Not Rated	10	000000000	00000
3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	1100 Aluminum	Not Rated	10	000000000	00000
1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	1100 Aluminum	Not Rated	5	000000000	00000

5052 Aluminum

0.005" Thick. (-0.0005" to 0.0005" Tolerance)
ID	ID Tolerance	OD	OD Tolerance	Material	Min. Hardness	Pkg. Qty.		Pkg.
1/4"	0" to 0.011"	3/8"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	00000
0.01" Thick. (-0.001" to 0.001" Tolerance)
1/4"	0" to 0.011"	3/8"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	0000
0.016" Thick. (-0.0015" to 0.0015" Tolerance)
1/4"	0" to 0.011"	3/8"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	0000
3/8"	0" to 0.011"	5/8"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	00000
1/2"	0" to 0.011"	3/4"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	00000
5/8"	0" to 0.011"	1"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	00000
3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	00000
1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	00000
0.02" Thick. (-0.002" to 0.002" Tolerance)
1/4"	0" to 0.011"	3/8"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	0000
3/8"	0" to 0.011"	5/8"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	00000
1/2"	0" to 0.011"	3/4"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	00000
5/8"	0" to 0.011"	1"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	00000
3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	00000
1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	00000
0.032" Thick. (-0.0025" to 0.0025" Tolerance)
1/4"	0" to 0.011"	3/8"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	00000
3/8"	0" to 0.011"	5/8"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	00000
1/2"	0" to 0.011"	3/4"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	0000
5/8"	0" to 0.011"	1"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	00000
3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	00000
1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	00000
0.063" Thick. (-0.0035" to 0.0035" Tolerance)
1/4"	0" to 0.011"	3/8"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	0000
3/8"	0" to 0.011"	5/8"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	0000
1/2"	0" to 0.011"	3/4"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	0000
5/8"	0" to 0.011"	1"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	0000
3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	0000
1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	5052 Aluminum	Not Rated	10	000000000	00000
1/8" Thick. (-0.007" to 0.007" Tolerance)
3/8"	0" to 0.011"	5/8"	-0.002" to 0.002"	5052 Aluminum	Not Rated	5	000000000	0000
1/2"	0" to 0.011"	3/4"	-0.002" to 0.002"	5052 Aluminum	Not Rated	5	000000000	00000
5/8"	0" to 0.011"	1"	-0.002" to 0.002"	5052 Aluminum	Not Rated	5	000000000	00000
3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	5052 Aluminum	Not Rated	5	000000000	00000

260-360 Brass

0.002" Thick. (-0.0006" to 0.0006" Tolerance)
ID	ID Tolerance	OD	OD Tolerance	Material	Min. Hardness	Specifications Met	Pkg. Qty.		Pkg.
3/8"	0" to 0.011"	5/8"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
1/2"	0" to 0.011"	3/4"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
0.005" Thick. (-0.0008" to 0.0008" Tolerance)
1/4"	0" to 0.011"	3/8"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	0000
3/8"	0" to 0.011"	5/8"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	0000
1/2"	0" to 0.011"	3/4"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	0000
5/8"	0" to 0.011"	1"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
7/8"	0" to 0.011"	1 3/8"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
1 1/4"	0" to 0.011"	1 3/4"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
0.01" Thick. (-0.0013" to 0.0013" Tolerance)
1/4"	0" to 0.011"	3/8"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	0000
3/8"	0" to 0.011"	5/8"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
1/2"	0" to 0.011"	3/4"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
5/8"	0" to 0.011"	1"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
7/8"	0" to 0.011"	1 3/8"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
1 1/4"	0" to 0.011"	1 3/4"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
0.016" Thick. (-0.0025" to 0.0025" Tolerance)
3/8"	0" to 0.011"	5/8"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
1/2"	0" to 0.011"	3/4"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
5/8"	0" to 0.011"	1"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	5	000000000	00000
0.02" Thick. (-0.003" to 0.003" Tolerance)
1/4"	0" to 0.011"	3/8"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	0000
3/8"	0" to 0.011"	5/8"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	0000
1/2"	0" to 0.011"	3/4"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	0000
5/8"	0" to 0.011"	1"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
7/8"	0" to 0.011"	1 3/8"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
1 1/4"	0" to 0.011"	1 3/4"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
0.025" Thick. (-0.003" to 0.003" Tolerance)
3/8"	0" to 0.011"	5/8"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
1/2"	0" to 0.011"	3/4"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
5/8"	0" to 0.011"	1"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
3/4"	0" to 0.011"	1 1/8"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000
1"	0" to 0.011"	1 1/2"	-0.002" to 0.002"	260-360 Brass	Rockwell B60	ASTM B36	10	000000000	00000

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Metal Sealing Washers

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