Fiber Rounds | McMaster-Carr

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	Shape Shape


Rod and Disc	Round Tube

Half Round	Rectangular Tube

	Diameter Diameter

	Length Length

	Material Material

Carbon Fiber

Hard Fiber

	OD OD

	ID ID

	Performance Properties Performance Properties

High Strength

Multipurpose

Impact Resistant

	Color Color

	Black
	Gray

	Texture Texture


Smooth	Coarse

	Tensile Strength Rating Tensile Strength Rating

Excellent

Good

	Maximum Temperature Maximum Temperature

180° F

235° F

250° F

	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

	Density Density

0.043 lbs./cu. in.

0.054 lbs./cu. in.

0.05-0.067 lbs./cu. in.

	Compressive Strength Compressive Strength

35,000 psi

75,000-128,000 psi

	Wall Thickness Wall Thickness

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

DFARS Specialty Metals
COTS-Exempt

	Dielectric Strength Dielectric Strength

200-215 V/mil

Not Rated

	Hardness Hardness

Rockwell R80

Not Rated

	Hardness Rating Hardness Rating

Hard

Not Rated

	Impact Strength Rating Impact Strength Rating

Good

Not Rated

	Impact Strength Impact Strength

1.8-2.5 ft.-lbs./in.

Not Rated

	Water Absorption Rating Water Absorption Rating

Poor

Not Rated

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91 Products

About Composites

Color: Black
Temperature Range: See table
Tensile Strength: 120,000-175,000 psi (Excellent)
Fiber Tensile Stiffness: Standard (33-36 msi)
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.

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

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.

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

Plain Tubes

Color: Black
Max. Temperature: 180° F
Tensile Strength: 120,000-175,000 psi (Excellent)
Fiber Tensile Stiffness: Standard (33-36 msi)
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)
Fiber Tensile Stiffness: Standard (33-36 msi)
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 Half Rounds

Color: Black
Temperature Range: 0° F to 250° F
Tensile Strength: 120,000-175,000 psi (Excellent)
Fiber Tensile Stiffness: Standard (33-36 msi)
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.

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

		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

Ultra-Strength Lightweight Carbon Fiber Square Tubes

Color: Black
Temperature Range: 0° F to 250° F
Tensile Strength: 120,000-175,000 psi (Excellent)
Fiber Tensile Stiffness: Standard (33-36 msi)
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.

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

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

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 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	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 94 HB

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	000000

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About Composites

Ultra-Strength Lightweight Carbon Fiber Rods

Ultra-Strength Lightweight Carbon Fiber Round Tubes

Ultra-Strength Lightweight Carbon Fiber Half Rounds

Ultra-Strength Lightweight Carbon Fiber Square Tubes

Easy-to-Machine Hard Fiber Rods

Easy-to-Machine Hard Fiber Tubes