Hard Fiber Framing | McMaster-Carr

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	System of Measurement System of Measurement

Inch

	Material Material	Show

Hard Fiber

	Material Material	Hide

	Thickness Thickness

	Length Length

	Flexibility Flexibility

	Rigid

	Shape Shape


Rod and Disc	Round Tube

Sheet and Bar

	Performance Properties Performance Properties

	Color Color

	Gray

	Specifications Met Specifications Met

Mil. Spec.

	Electrical Insulation Rating Electrical Insulation Rating

Good

Poor

	Dielectric Strength Dielectric Strength

	Texture Texture

	Smooth

	Clarity Clarity

Opaque

	Hardness Rating Hardness Rating

Hard

Rockwell R70

Rockwell R80

	Width Width

12"

24"

39"

	Impact Strength Rating Impact Strength Rating

Good

	Impact Strength Impact Strength

1.8-2.5 ft.-lbs./in.

2.5 ft.-lbs./in.

	Maximum Temperature Maximum Temperature

Less than 250° F

	For Use Outdoors For Use Outdoors

	Compressive Strength Compressive Strength

35,000 psi

	Flexural Strength Flexural Strength

13,000-15,000 psi

16,000-29,000 psi

	Density Density

0.043 lbs./cu. in.

	Tensile Strength Tensile Strength

9,000-21,000 psi

10,000-21,000 psi

Not Rated

	Reinforcement Material Reinforcement Material

Fabric

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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: Rockwell R80 (Hard)
For Use Outdoors: No
Specifications Met: MIL-F-10336A, MIL-F-1148A, UL 94HB

Readily machined and punched into custom parts, these hard fiber tubes are often made into bushings and washers. Also known as vulcanized fiber, they're 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.

Wall Thick.	Wall Thick. Tolerance	OD	OD Tolerance	ID	ID Tolerance	Lg.		Each
1/16"	-0.01" to 0.01"	9/16"	-0.005" to 0.005"	7/16"	-0.008" to 0.008"	40"	0000000	000000
1/16"	-0.01" to 0.01"	5/8"	-0.005" to 0.005"	1/2"	-0.008" to 0.008"	40"	0000000	00000
1/16"	-0.01" to 0.01"	7/8"	-0.005" to 0.005"	3/4"	-0.008" to 0.008"	40"	0000000	00000
1/16"	-0.01" to 0.01"	1"	-0.005" to 0.005"	7/8"	-0.008" to 0.008"	40"	0000000	00000
1/8"	-0.015" to 0.015"	11/16"	-0.005" to 0.005"	7/16"	-0.008" to 0.008"	40"	0000000	00000
1/8"	-0.01" to 0.01"	3/4"	-0.005" to 0.005"	1/2"	-0.008" to 0.008"	40"	0000000	00000
1/8"	-0.01" to 0.01"	1 1/4"	-0.008" to 0.008"	1"	-0.008" to 0.008"	40"	0000000	00000
1/8"	-0.01" to 0.01"	1 1/2"	-0.008" to 0.008"	1 1/4"	-0.01" to 0.01"	40"	0000000	00000
1/8"	-0.01" to 0.01"	1 3/4"	-0.008" to 0.008"	1 1/2"	-0.01" to 0.01"	40"	0000000	00000
1/8"	-0.01" to 0.01"	2 1/4"	-0.01" to 0.01"	2"	-0.01" to 0.01"	40"	0000000	00000
1/4"	-0.015" to 0.015"	2"	-0.008" to 0.008"	1 1/2"	-0.01" to 0.01"	40"	0000000	00000

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-695A, UL 94HB

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.

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

Easy-to-Machine Hard Fiber Sheets

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

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	00000
5/8"	-0.006" to 0.006"	0000000	00000
3/4"	-0.006" to 0.006"	0000000	00000

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About Composites

Easy-to-Machine Hard Fiber Tubes

Electrically Insulating Hard Fiber

Easy-to-Machine Hard Fiber Sheets

Easy-to-Machine Hard Fiber Rods