Hard Fiber Panels | McMaster-Carr

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	System of Measurement System of Measurement

Inch

	Thickness Thickness

	Length Length

	Width Width

12"

24"

39"

	Shape Shape

	Rod and Disc
	Sheet and Bar

	Material Material	Show

Hard Fiber

	Material Material	Hide

	Flexibility Flexibility

	Rigid

	Backing Type Backing Type

	Plain

	Color Color

	Gray

	Performance Properties Performance Properties

	Texture Texture

	Smooth

	Maximum Temperature Maximum Temperature

Less than 500° F

	Hardness Rating Hardness Rating

Hard

	Impact Strength Rating Impact Strength Rating

Good

	Diameter Diameter

	Specifications Met Specifications Met

Mil. Spec.

UL 94

	Dielectric Strength Dielectric Strength

	Electrical Insulation Rating Electrical Insulation Rating

Good

Poor

	Clarity Clarity

Opaque

	For Use Outdoors For Use Outdoors

	Tolerance Rating Tolerance Rating

Standard

	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

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About Composites

Color: Gray
Max. Temperature: 235° F
Tensile Strength: 9,000-21,000 psi (Good)
Impact Strength: 1.8-2.5 ft.-lbs./in. (Good)
Hardness: See table
For Use Outdoors: No
Specifications Met: See table

Also known as vulcanized fiber, these hard fiber sheets can be readily machined and punched into custom parts. They're constructed from lightweight cotton fabric that's been chemically treated to make them hard and dense. Use hard fiber to make gears and bushings.

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

12" × 12"
Thick.	Thick. Tolerance	Hardness	Specifications Met		Each
0.02"	-0.002" to 0.002"	Rockwell R70 (Hard)	MIL-I-695, UL 94 HB	0000000	000000
0.03"	-0.003" to 0.003"	Rockwell R70 (Hard)	MIL-I-695, UL 94 HB	0000000	00000
1/16"	-0.005" to 0.005"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	00000
3/32"	-0.007" to 0.007"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	00000
1/8"	-0.015" to 0.015"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	00000
3/16"	-0.015" to 0.015"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	00000
1/4"	-0.015" to 0.015"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	00000
3/8"	-0.02" to 0.02"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	000000
1/2"	-0.025" to 0.025"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	000000
24" × 39"
0.02"	-0.002" to 0.002"	Rockwell R70 (Hard)	MIL-I-695, UL 94 HB	0000000	00000
0.03"	-0.003" to 0.003"	Rockwell R70 (Hard)	MIL-I-695, UL 94 HB	0000000	00000
1/16"	-0.005" to 0.005"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	00000
3/32"	-0.007" to 0.007"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	000000
1/8"	-0.015" to 0.015"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	000000
3/16"	-0.015" to 0.015"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	000000
1/4"	-0.015" to 0.015"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	000000
3/8"	-0.02" to 0.02"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	000000
1/2"	-0.025" to 0.025"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	000000
39" × 48"
0.02"	-0.002" to 0.002"	Rockwell R70 (Hard)	MIL-I-695, UL 94 HB	0000000	00000
0.03"	-0.003" to 0.003"	Rockwell R70 (Hard)	MIL-I-695, UL 94 HB	0000000	00000
1/16"	-0.005" to 0.005"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	000000
3/32"	-0.007" to 0.007"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	000000
1/8"	-0.015" to 0.015"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	000000
3/16"	-0.015" to 0.015"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	000000
1/4"	-0.015" to 0.015"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	000000
3/8"	-0.02" to 0.02"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	000000
1/2"	-0.025" to 0.025"	Rockwell R80 (Hard)	MIL-F-10336, MIL-F-1148, UL 94 HB	0000000	000000

Easy-to-Machine Hard Fiber Rods

Color: Gray
Max. Temperature: 235° F
Tensile Strength: 9,000-21,000 psi (Good)
Impact Strength: 1.8-2.5 ft.-lbs./in. (Good)
Hardness: Rockwell R80 (Hard)
For Use Outdoors: No
Specifications Met: MIL-F-10336, MIL-F-1148, UL 94 HB

Frequently used to make gears and bushings, these hard fiber rods can be readily machined and punched into custom parts. They are constructed from lightweight cotton fabric that's been chemically treated to make them hard and dense. Hard fiber is also known as vulcanized fiber.

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

		45" Lg.
Dia.	Dia. Tolerance		Each
3/16"	-0.005" to 0.005"	0000000	000000
1/4"	-0.005" to 0.005"	0000000	00000
5/16"	-0.006" to 0.006"	0000000	00000
3/8"	-0.006" to 0.006"	0000000	00000
1/2"	-0.006" to 0.006"	0000000	00000
9/16"	-0.006" to 0.006"	0000000	000000
5/8"	-0.006" to 0.006"	0000000	000000
3/4"	-0.006" to 0.006"	0000000	000000

Electrically Insulating Hard Fiber

Color: Gray
Max. Temperature: 235° F
Tensile Strength: See Table
Impact Strength: 2.5 ft.-lbs./in. (Good)
Hardness: Rockwell R70 (Hard)
For Use Outdoors: No
Specifications Met: MIL-I-695, UL 94 HB

Widely known as fishpaper and vulcanized fiber, these thin sheets offer better electrical insulation than standard hard fiber sheets. They are constructed from lightweight cotton fabric that's been chemically treated to make it hard and dense.

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

			12" × 12"		24" × 39"		39" × 48"
Thick.	Thick. Tolerance	Tensile Strength		Each		Each		Each
0.005"	-0.001" to 0.001"	9,000-21,000 psi (Good)	0000000	00000	0000000	000000	0000000	000000
0.01"	-0.001" to 0.001"	9,000-21,000 psi (Good)	0000000	0000	0000000	00000	0000000	00000
0.015"	-0.002" to 0.002"	9,000-21,000 psi (Good)	0000000	0000	0000000	00000	0000000	00000
0.02"	-0.002" to 0.002"	Not Rated	0000000	00000	0000000	00000	0000000	00000
0.025"	-0.003" to 0.003"	Not Rated	0000000	00000	0000000	00000	0000000	00000
0.03"	-0.003" to 0.003"	Not Rated	0000000	00000	0000000	00000	0000000	00000
0.04"	-0.004" to 0.004"	Not Rated	0000000	00000	0000000	000000	000000	00
0.045"	-0.005" to 0.005"	Not Rated	0000000	00000	0000000	000000	000000	00
0.062"	-0.007" to 0.007"	10,000-21,000 psi (Good)	0000000	00000	0000000	000000	0000000	000000

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About Composites

Easy-to-Machine Hard Fiber Sheets

Easy-to-Machine Hard Fiber Rods

Electrically Insulating Hard Fiber