McMaster-Carr

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	Shape Shape


Rod and Disc	Round Tube

Sheet and Bar	Rectangular Tube

Half Round

	Diameter Diameter

	Thickness Thickness

	Material Material

Hard Fiber

Carbon Fiber

	OD OD

	ID ID

	Wall Thickness Wall Thickness

	Performance Properties Performance Properties

	Color Color

	Gray
	Black

	Texture Texture


Smooth	Coarse

	Impact Strength Rating Impact Strength Rating

Good

Not Rated

	Length Length

	Width Width

12"

24"

39"

	Tensile Strength Rating Tensile Strength Rating

Excellent

Good

	Tensile Strength Tensile Strength

9,000-21,000 psi

120,000-175,000 psi

	Flexural Strength Flexural Strength

16,000-29,000 psi

89,000-174,000 psi

	Electrical Insulation Rating Electrical Insulation Rating

Good

Poor

Not Rated

	Impact Strength Impact Strength

1.8-2.5 ft.-lbs./in.

Not Rated

	Water Absorption Rating Water Absorption Rating

Poor

Not Rated

	Compressive Strength Compressive Strength

35,000 psi

75,000-128,000 psi

	Hardness Rating Hardness Rating

Hard

Not Rated

	Specifications Met Specifications Met

Mil. Spec.

	Appearance Appearance

Checked

Plain

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127 Products

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

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

Easy-to-Machine Hard Fiber Tubes

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

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.

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

Electrically Insulating Hard Fiber

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 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		Each
0.005"	-0.001" to 0.001"	0000000	00000
0.01"	-0.001" to 0.001"	0000000	0000
0.015"	-0.002" to 0.002"	0000000	0000
24" × 39"
0.005"	-0.001" to 0.001"	0000000	00000
0.01"	-0.001" to 0.001"	0000000	00000
0.015"	-0.002" to 0.002"	0000000	00000
39" × 48"
0.005"	-0.001" to 0.001"	0000000	00000
0.01"	-0.001" to 0.001"	0000000	00000
0.015"	-0.002" to 0.002"	0000000	00000

Ultra-Strength Lightweight Carbon Fiber Rods

Color: Black
Temperature Range: See table
Tensile Strength: 120,000-175,000 psi (Excellent)
Impact Strength: Not Rated
Hardness: Not Rated
For Use Outdoors: No

Strong and lightweight, these rods are made of carbon fiber, the strongest composite we offer. Carbon fiber is comparable in strength to 6061 aluminum yet lighter in weight. These rods are often used to build frames and structures.

12" Lg.
Dia.	Dia. Tolerance	Min. Temp., °F	Max. Temp., °F		Each
1/16"	-0.006" to 0.006"	Not Rated	180°	0000000	00000
3/32"	-0.006" to 0.006"	Not Rated	180°	0000000	0000
1/8"	-0.006" to 0.006"	Not Rated	180°	0000000	0000
1/4"	-0.006" to 0.006"	Not Rated	180°	0000000	0000
5/16"	-0.006" to 0.006"	Not Rated	180°	0000000	00000
3/8"	-0.006" to 0.006"	Not Rated	180°	0000000	00000
1/2"	-0.006" to 0.006"	Not Rated	180°	0000000	00000
5/8"	-0.006" to 0.006"	Not Rated	180°	0000000	00000
3/4"	-0.006" to 0.006"	Not Rated	180°	0000000	00000
24" Lg.
1/16"	-0.006" to 0.006"	Not Rated	180°	0000000	0000
3/32"	-0.006" to 0.006"	Not Rated	180°	0000000	0000
1/8"	-0.006" to 0.006"	Not Rated	180°	0000000	0000
1/4"	-0.006" to 0.006"	Not Rated	180°	0000000	00000
5/16"	-0.006" to 0.006"	Not Rated	180°	0000000	00000
3/8"	-0.006" to 0.006"	Not Rated	180°	0000000	00000
1/2"	-0.006" to 0.006"	Not Rated	180°	0000000	00000
5/8"	-0.006" to 0.006"	Not Rated	180°	0000000	00000
3/4"	-0.006" to 0.006"	Not Rated	180°	0000000	000000
36" Lg.
0.011"	-0.007" to 0.007"	0°	250°	0000000	0000
0.039"	-0.007" to 0.007"	0°	250°	0000000	0000
48" Lg.
1/16"	-0.006" to 0.006"	Not Rated	180°	0000000	00000
3/32"	-0.006" to 0.006"	Not Rated	180°	0000000	00000
1/8"	-0.006" to 0.006"	Not Rated	180°	0000000	00000
1/4"	-0.006" to 0.006"	Not Rated	180°	0000000	00000
5/16"	-0.006" to 0.006"	Not Rated	180°	0000000	00000
3/8"	-0.006" to 0.006"	Not Rated	180°	0000000	00000
1/2"	-0.006" to 0.006"	Not Rated	180°	0000000	000000
5/8"	-0.006" to 0.006"	Not Rated	180°	0000000	000000
3/4"	-0.006" to 0.006"	Not Rated	180°	0000000	000000

Ultra-Strength Lightweight Carbon Fiber Round Tubes

Made of carbon fiber, these are the strongest composite round tubes we offer. Carbon fiber is comparable in strength to 6061 aluminum yet lighter in weight. These round tubes are often used to build frames and structures.

Plain Tubes

Color: Black
Max. Temperature: 180° F
Tensile Strength: 120,000-175,000 psi (Excellent)
Impact Strength: Not Rated
Hardness: Not Rated
For Use Outdoors: No

12" Lg.
Wall Thick.	OD	OD Tolerance	ID	ID Tolerance		Each
0.01"	0.039"	-0.006" to 0.006"	0.02"	-0.006" to 0.006"	00000000	00000
0.02"	0.078"	-0.006" to 0.006"	0.039"	-0.006" to 0.006"	00000000	0000
0.02"	0.118"	-0.006" to 0.006"	0.079"	-0.006" to 0.006"	00000000	0000
0.02"	0.236"	-0.006" to 0.006"	0.196"	-0.006" to 0.006"	00000000	0000
0.04"	0.197"	-0.006" to 0.006"	0.118"	-0.006" to 0.006"	00000000	0000
0.04"	0.314"	-0.006" to 0.006"	0.236"	-0.006" to 0.006"	00000000	0000
0.04"	0.393"	-0.006" to 0.006"	0.314"	-0.006" to 0.006"	00000000	0000
0.041"	0.472"	-0.006" to 0.006"	0.39"	-0.006" to 0.006"	00000000	00000
39" Lg.
0.01"	0.039"	-0.006" to 0.006"	0.02"	-0.006" to 0.006"	00000000	00000
0.02"	0.078"	-0.006" to 0.006"	0.039"	-0.006" to 0.006"	00000000	0000
0.02"	0.118"	-0.006" to 0.006"	0.079"	-0.006" to 0.006"	0000000	0000
0.02"	0.236"	-0.006" to 0.006"	0.196"	-0.006" to 0.006"	0000000	00000
0.04"	0.197"	-0.006" to 0.006"	0.118"	-0.006" to 0.006"	0000000	00000
0.04"	0.314"	-0.006" to 0.006"	0.236"	-0.006" to 0.006"	0000000	00000
0.04"	0.393"	-0.006" to 0.006"	0.314"	-0.006" to 0.006"	0000000	00000
0.041"	0.472"	-0.006" to 0.006"	0.39"	-0.006" to 0.006"	0000000	00000
72" Lg.
0.01"	0.039"	-0.006" to 0.006"	0.02"	-0.006" to 0.006"	00000000	00000
0.02"	0.078"	-0.006" to 0.006"	0.039"	-0.006" to 0.006"	00000000	00000
0.02"	0.118"	-0.006" to 0.006"	0.079"	-0.006" to 0.006"	00000000	00000
0.02"	0.236"	-0.006" to 0.006"	0.196"	-0.006" to 0.006"	00000000	00000
0.04"	0.197"	-0.006" to 0.006"	0.118"	-0.006" to 0.006"	00000000	00000
0.04"	0.314"	-0.006" to 0.006"	0.236"	-0.006" to 0.006"	00000000	00000
0.04"	0.393"	-0.006" to 0.006"	0.314"	-0.006" to 0.006"	00000000	00000
0.041"	0.472"	-0.006" to 0.006"	0.39"	-0.006" to 0.006"	00000000	00000

Checked Tubes

Color: Black
Max. Temperature: See table
Tensile Strength: 120,000-175,000 psi (Excellent)
Impact Strength: Not Rated
Hardness: Not Rated
For Use Outdoors: No

Wall Thick.	Wall Thick. Tolerance	OD	OD Tolerance	ID	ID Tolerance	Max. Temp., °F		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
1/32"	-0.005" to 0.005"	1"	-0.012" to 0.012"	15/16"	-0.006" to 0.006"	180°	0000000	000000	000000	0000000
0.041"	-0.005" to 0.005"	0.832"	-0.012" to 0.012"	3/4"	-0.006" to 0.006"	250°	0000000	00000	00000	000000
0.042"	-0.005" to 0.005"	0.584"	-0.012" to 0.012"	1/2"	-0.006" to 0.006"	250°	0000000	00000	00000	000000
0.042"	-0.005" to 0.005"	1.334"	-0.012" to 0.012"	1 1/4"	-0.006" to 0.006"	250°	0000000	00000	000000	000000
0.05"	-0.005" to 0.005"	1.6"	-0.012" to 0.012"	1 1/2"	-0.006" to 0.006"	250°	0000000	00000	000000	000000
0.06"	-0.005" to 0.005"	1.12"	-0.012" to 0.012"	1"	-0.006" to 0.006"	250°	0000000	00000	000000	000000
1/16"	-0.005" to 0.005"	1 5/16"	-0.012" to 0.012"	1 3/16"	-0.006" to 0.006"	180°	0000000	00000	000000	000000
1/16"	-0.005" to 0.005"	1 5/8"	-0.012" to 0.012"	1 1/2"	-0.006" to 0.006"	180°	0000000	00000	000000	000000
1/16"	-0.005" to 0.005"	1 7/8"	-0.012" to 0.012"	1 3/4"	-0.006" to 0.006"	180°	0000000	00000	000000	000000

Ultra-Strength Lightweight Carbon Fiber Square Tubes

Color: Black
Temperature Range: 0° F to 250° F
Tensile Strength: 120,000-175,000 psi (Excellent)
Impact Strength: Not Rated
Hardness: Not Rated
For Use Outdoors: No

Often used to build frames and structures, these square tubes are made of carbon fiber, the strongest composite we offer. Carbon fiber is comparable in strength to 6061 aluminum yet lighter in weight.

Outside				Inside
Wd.	Wd. Tolerance	Ht.	Ht. Tolerance	Wd.	Ht.		Each
12" Lg.
0.04" Wall Thick. (-0.02" to 0.02")
0.83"	-0.02" to 0.02"	0.83"	-0.02" to 0.02"	3/4"	3/4"	0000000	000000
1.08"	-0.02" to 0.02"	1.08"	-0.02" to 0.02"	1"	1"	0000000	00000
0.06" Wall Thick. (-0.02" to 0.02")
1.37"	-0.02" to 0.02"	1.37"	-0.02" to 0.02"	1 1/4"	1 1/4"	0000000	00000
32" Lg.
0.04" Wall Thick. (-0.02" to 0.02")
0.83"	-0.02" to 0.02"	0.83"	-0.02" to 0.02"	3/4"	3/4"	0000000	000000
1.08"	-0.02" to 0.02"	1.08"	-0.02" to 0.02"	1"	1"	0000000	000000
0.06" Wall Thick. (-0.02" to 0.02")
1.37"	-0.02" to 0.02"	1.37"	-0.02" to 0.02"	1 1/4"	1 1/4"	0000000	000000

Ultra-Strength Lightweight Carbon Fiber Half Rounds

Color: Black
Temperature Range: 0° F to 250° F
Tensile Strength: 120,000-175,000 psi (Excellent)
Impact Strength: Not Rated
Hardness: Not Rated
For Use Outdoors: No

These half rounds are made of carbon fiber, our strongest composite material. They are often used to build frames and structures. Carbon fiber is comparable in strength to 6061 aluminum yet lighter in weight.

		36" Lg.		78" Lg.
Dia.	Dia. Tolerance		Each		Each
0.039"	-0.007" to 0.007"	0000000	00000	0000000	000000
0.15"	-0.007" to 0.007"	0000000	0000	0000000	00000

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About Composites

Easy-to-Machine Hard Fiber Rods

Easy-to-Machine Hard Fiber Tubes

Easy-to-Machine Hard Fiber Sheets

Electrically Insulating Hard Fiber

Ultra-Strength Lightweight Carbon Fiber Rods

Ultra-Strength Lightweight Carbon Fiber Round Tubes

Ultra-Strength Lightweight Carbon Fiber Square Tubes

Ultra-Strength Lightweight Carbon Fiber Half Rounds