Hard Fiber Shims | McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	ID ID

	OD OD

	Thickness Thickness

	For Screw Size For Screw Size

	Washer Type Washer Type


Flat	Sleeve

	Material Material	Show

Hard Fiber

	Material Material	Hide

Fabric-Reinforced Buna-
N Rubber

	Color Color

	Black
	Red
	Gray

	Maximum Temperature Maximum Temperature

200° to 249° F

	Minimum Temperature Minimum Temperature

Not Rated

	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

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

DFARS Specialty Metals
COTS-Exempt

	Hardness Hardness

Rockwell R50

Rockwell R70

Not Rated

	Sleeve OD Sleeve OD

	Overall Height Overall Height

0.055"

0.070"

0.100"

	Specifications Met Specifications Met

92 Products

About Washers

These washers are excellent electrical insulators.

Hard fiber washers resist organic solvents and petroleum-based oils.

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

				Temperature Range, °F
For Screw Size	ID	OD	Thick.	Min.	Max.	Hardness	Specifications Met	Color	Pkg. Qty.		Pkg.
Hard Fiber
No. 2	0.094"	0.250"	0.010"-0.020"	Not Rated	230°	Rockwell R70	__	Black	100	000000000	000000
No. 2	0.094"	0.250"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	100	000000000	0000
No. 2	0.094"	0.250"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
No. 4	0.125"	0.250"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	100	000000000	0000
No. 4	0.125"	0.250"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
No. 4	0.125"	0.312"	0.010"-0.020"	Not Rated	230°	Rockwell R70	__	Black	100	000000000	00000
No. 6	0.145"	0.375"	0.026"-0.036"	Not Rated	230°	Rockwell R70	__	Black	100	000000000	00000
No. 6	0.156"	0.312"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	100	000000000	0000
No. 6	0.156"	0.312"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
No. 8	0.172"	0.375"	0.026"-0.036"	Not Rated	230°	Rockwell R70	__	Black	100	000000000	00000
No. 8	0.188"	0.375"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	100	000000000	0000
No. 8	0.188"	0.375"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
No. 10	0.203"	0.375"	0.042"-0.052"	Not Rated	230°	Rockwell R70	__	Black	100	000000000	00000
No. 10	0.203"	0.438"	0.041"-0.051"	Not Rated	230°	Rockwell R70	__	Black	100	000000000	00000
No. 12	0.234"	0.500"	0.042"-0.052"	Not Rated	230°	Rockwell R70	__	Black	50	000000000	0000
1/4"	0.250"	0.375"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	100	000000000	0000
1/4"	0.250"	0.375"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
1/4"	0.250"	0.500"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	100	000000000	0000
1/4"	0.250"	0.500"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
1/4"	0.281"	0.625"	0.057"-0.067"	Not Rated	230°	Rockwell R70	ASME B18.21.1	Black	25	000000000	00000
5/16"	0.312"	0.438"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	100	000000000	0000
5/16"	0.312"	0.438"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
5/16"	0.312"	0.562"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	100	000000000	0000
5/16"	0.312"	0.562"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
5/16"	0.325"	0.688"	0.057"-0.067"	Not Rated	230°	Rockwell R70	__	Black	100	000000000	00000
3/8"	0.375"	0.500"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	100	000000000	0000
3/8"	0.375"	0.500"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
3/8"	0.375"	0.625"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	100	000000000	0000
3/8"	0.375"	0.625"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
3/8"	0.375"	2.250"	0.120"-0.130"	Not Rated	230°	Rockwell R70	__	Gray	10	000000000	00000
3/8"	0.406"	0.875"	0.088"-0.098"	Not Rated	230°	Rockwell R70	__	Black	25	000000000	00000
7/16"	0.438"	0.625"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	50	000000000	0000
7/16"	0.438"	0.625"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
1/2"	0.500"	0.625"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
1/2"	0.500"	0.688"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	100	000000000	0000
1/2"	0.500"	0.688"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
1/2"	0.500"	0.750"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	100	000000000	0000
1/2"	0.500"	0.750"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
1/2"	0.500"	2.250"	0.120"-0.130"	Not Rated	230°	Rockwell R70	__	Gray	10	000000000	00000
1/2"	0.531"	1.000"	0.088"-0.098"	Not Rated	230°	Rockwell R70	__	Black	25	000000000	00000
9/16"	0.562"	0.812"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	100	000000000	00000
9/16"	0.562"	0.812"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
5/8"	0.625"	0.750"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
5/8"	0.625"	0.875"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	50	000000000	0000
5/8"	0.625"	0.875"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
5/8"	0.625"	2.250"	0.120"-0.130"	Not Rated	230°	Rockwell R70	__	Gray	10	000000000	00000
5/8"	0.645"	1.063"	0.088"-0.098"	Not Rated	230°	Rockwell R70	__	Black	25	000000000	00000
5/8"	0.688"	0.938"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
3/4"	0.750"	1.000"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	100	000000000	0000
3/4"	0.750"	1.000"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
3/4"	0.750"	1.063"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	0000
3/4"	0.750"	2.250"	0.120"-0.130"	Not Rated	230°	Rockwell R70	__	Gray	10	000000000	00000
3/4"	0.810"	1.125"	0.120"-0.130"	Not Rated	230°	Rockwell R70	__	Black	10	000000000	00000
3/4"	0.812"	1.125"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	100	000000000	0000
3/4"	0.812"	1.125"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	50	000000000	0000
7/8"	0.875"	1.188"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	100	000000000	0000
7/8"	0.875"	1.188"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	00000
7/8"	0.875"	2.250"	0.120"-0.130"	Not Rated	230°	Rockwell R70	__	Gray	10	000000000	00000
7/8"	0.930"	1.250"	0.120"-0.130"	Not Rated	230°	Rockwell R70	__	Black	10	000000000	00000
7/8"	0.938"	1.250"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	50	000000000	0000
1"	1.000"	1.250"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	100	000000000	0000
1"	1.000"	1.250"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	00000
1"	1.000"	2.250"	0.120"-0.130"	Not Rated	230°	Rockwell R70	__	Gray	10	000000000	00000
1"	1.031"	1.312"	0.014"-0.016"	Not Rated	230°	Not Rated	__	Gray	50	000000000	00000
1"	1.031"	1.312"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	50	000000000	0000
1"	1.125"	2.000"	0.120"-0.130"	Not Rated	230°	Rockwell R70	__	Black	10	000000000	00000
1 1/4"	1.250"	1.625"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	50	000000000	00000
1 1/4"	1.312"	2.125"	0.120"-0.130"	Not Rated	230°	Rockwell R70	__	Black	5	000000000	0000
1 1/8"	1.188"	1.562"	0.028"-0.034"	Not Rated	230°	Not Rated	__	Red	100	000000000	00000

Metric Electrical-Insulating Plastic Washers

These washers are excellent electrical insulators.

Hard fiber washers are resistant to organic solvents and petroleum-based oils.

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

Hard Fiber
For Screw Size	ID, mm	OD, mm	Thick., mm	Max. Temperature, °F	Hardness	Specifications Met	Pkg. Qty.		Pkg.
Black
M1.2	1.3	3.8	0.2-0.3	230°	Rockwell R70	DIN 125	10	000000000	000000
M1.4	1.5	3.8	0.2-0.3	230°	Rockwell R70	DIN 125	10	000000000	00000
M1.6	1.7	3.9	0.2-0.3	230°	Rockwell R70	DIN 125	10	000000000	00000
M2.5	2.7	6.5	0.4-0.6	230°	Not Rated	DIN 125	100	000000000	00000
M3	3.2	7.0	0.4-0.6	230°	Not Rated	DIN 125	100	000000000	00000
M3.5	3.7	7.8	0.5-0.6	230°	Rockwell R70	DIN 125	10	000000000	00000
M4	4.3	9.0	0.7-0.9	230°	Not Rated	DIN 125	100	000000000	00000
M6	6.4	12.5	1.4-1.7	230°	Not Rated	DIN 125	50	000000000	0000
M7	7.4	13.8	1.4-1.7	230°	Rockwell R70	DIN 125	10	000000000	00000
M8	8.4	17.0	1.4-1.7	230°	Not Rated	DIN 125	50	000000000	0000
M10	10.5	21.0	1.8-2.2	230°	Rockwell R50	DIN 125	50	000000000	00000
M12	13	24.0	2.1-2.5	230°	Rockwell R50	DIN 125	50	000000000	00000
M16	17	30.0	2.1-2.5	230°	Rockwell R50	DIN 125	25	000000000	0000
M20	21	37.0	2.1-2.5	230°	Rockwell R50	DIN 125	25	000000000	00000
M24	25	44.0	2.8-3.5	230°	Rockwell R50	DIN 125	10	000000000	0000
M30	31	56.0	2.8-3.6	230°	Rockwell R50	DIN 125	10	000000000	00000

Electrical-Insulating Sleeve Washers

Also known as shoulder or insulator washers, these nonmetal washers block electrical current and prevent galvanic corrosion from mating different types of metal.

Hard fiber washers resist organic solvents and petroleum-based oil.

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

						Temperature Range, °F
For Screw Size	ID	OD	Sleeve OD	Thick.	Overall Ht.	Min.	Max.	Color	Pkg. Qty.		Pkg.
Hard Fiber
No. 2	0.090"	0.250"	0.154"	0.030"	0.055"	Not Rated	230°	Black	50	000000000	000000
No. 4	0.116"	0.250"	0.186"	0.030"	0.055"	Not Rated	230°	Black	50	000000000	00000
No. 6	0.142"	0.313"	0.186"	0.040"	0.070"	Not Rated	230°	Black	50	000000000	0000
No. 8	0.168"	0.375"	0.246"	0.040"	0.070"	Not Rated	230°	Black	50	000000000	00000
No. 10	0.194"	0.375"	0.312"	0.040"	0.070"	Not Rated	230°	Black	50	000000000	00000
1/4"	0.254"	0.500"	0.312"	0.040"	0.070"	Not Rated	230°	Black	50	000000000	00000
3/8"	0.380"	0.625"	0.437"	0.060"	0.100"	Not Rated	230°	Black	50	000000000	00000