Rectangular-Tube Fiberglass

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System of Measurement

Outside Width

Shape

Outside Height

Length

Wall Thickness

Material

Inside Width

Performance

Electrically Insulating

Ultra Impact Resistant

Inside Height

Flexibility

Color

For Use Outdoors

Outside Corner Shape

Texture

Hardness Rating

Maximum Temperature

Tensile Strength

7,000 psi to 30,000 psi

10,000 psi to 15,000 psi

32,000 psi to 40,000 psi

Export Control Classification Number (ECCN)

EAR99

Dielectric Strength

35 V/mil to 200 V/mil

200 V/mil to 600 V/mil

350 V/mil to 650 V/mil

DFARS Specialty Metals

Exempt

Compressive Strength Range

15,000 psi to 30,000 psi

32,000 psi to 42,000 psi

35,000 psi to 70,000 psi

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

REACH

Compliant

RoHS

Compliant

Density

0.058 lb/in³ to 0.070 lb/in³

26 Products

About Composites

Compare our offering of composites to find the right material for you.

Structural FRP Fiberglass Square Tubes

Use these FRP fiberglass square tubes as an alternative to wood in structural applications. Made of fiberglass-reinforced polyester, they are strong and lightweight.

Outside				Inside									5 ft. Long		10 ft. Long
Wd.	Wd. Tolerance	Ht.	Ht. Tolerance	Wd.	Ht.	Straightness Tolerance	Color	Temp. Range, ° F	Tensile Strength, psi	Impact Strength, ft·lbf/in	Hardness	For Use Outdoors		Each		Each







			1/8" Thick Wall (-0.019" to 0.019")

			1"	-0.094" to 0.094"	1"	-0.094" to 0.094"	3/4"	3/4"	0.03"/1 ft.	Green	-60 to 140	7,000 to 30,000	4 to 25	Barcol 45 (Hard)	Yes	8548K21	000000	8548K31	000000


			1 1/4"	-0.094" to 0.094"	1 1/4"	-0.094" to 0.094"	1"	1"	0.03"/1 ft.	Green	-60 to 140	7,000 to 30,000	4 to 25	Barcol 45 (Hard)	Yes	8548K42	00000	8548K52	00000
			1 1/2"	-0.094" to 0.094"	1 1/2"	-0.094" to 0.094"	1 1/4"	1 1/4"	0.03"/1 ft.	Green	-60 to 140	7,000 to 30,000	4 to 25	Barcol 45 (Hard)	Yes	8548K22	00000	8548K32	00000
			1 3/4"	-0.094" to 0.094"	1 3/4"	-0.094" to 0.094"	1 1/2"	1 1/2"	0.03"/1 ft.	Green	-60 to 140	7,000 to 30,000	4 to 25	Barcol 45 (Hard)	Yes	8548K43	00000	8548K53	00000
			2"	-0.094" to 0.094"	2"	-0.094" to 0.094"	1 3/4"	1 3/4"	0.03"/1 ft.	Green	-60 to 140	7,000 to 30,000	4 to 25	Barcol 45 (Hard)	Yes	8548K23	00000	8548K33	00000




					1/4" Thick Wall (-0.038" to 0.038")

					2"	-0.094" to 0.094"	2"	-0.094" to 0.094"	1 1/2"	1 1/2"	0.03"/1 ft.	Green	-60 to 140	7,000 to 30,000	4 to 25	Barcol 45 (Hard)	Yes	8548K24	00000	8548K34	000000


					2 1/2"	-0.094" to 0.094"	2 1/2"	-0.094" to 0.094"	2"	2"	0.03"/1 ft.	Green	-60 to 140	7,000 to 30,000	4 to 25	Barcol 45 (Hard)	Yes	8548K71	000000	8548K81	000000
					3"	-0.094" to 0.094"	3"	-0.094" to 0.094"	2 1/2"	2 1/2"	0.03"/1 ft.	Green	-60 to 140	7,000 to 30,000	4 to 25	Barcol 45 (Hard)	Yes	8548K25	000000	8548K35	000000
					4"	-0.094" to 0.094"	4"	-0.094" to 0.094"	3 1/2"	3 1/2"	0.03"/1 ft.	Green	-60 to 140	7,000 to 30,000	4 to 25	Barcol 45 (Hard)	Yes	8548K26	000000	8548K36	000000




							3/8" Thick Wall (-0.056" to 0.056")

							6"	-0.094" to 0.094"	6"	-0.094" to 0.094"	5 1/4"	5 1/4"	0.03"/1 ft.	Green	-60 to 140	7,000 to 30,000	4 to 25	Barcol 45 (Hard)	Yes	8548K29	000000	8548K39	000000

Arc-Resistant GPO3 Fiberglass Square Tubes

Route and insulate wire using these square fiberglass tubes, which fit better along edges and around corners than round tubes. Use them for electrical applications in humid locations. They’re arc and track resistant, and better electrical insulators than FRP fiberglass. Made of fiberglass-reinforced polyester, they’re also known as polyester-grade industrial laminate.

	Outside				Inside									5 ft. Long
	Wd.	Wd. Tolerance	Ht.	Ht. Tolerance	Wd.	Ht.	Straightness Tolerance	Color	Temp. Range, ° F	Tensile Strength, psi	Impact Strength, ft·lbf/in	Hardness	For Use Outdoors		Each
UL 94 V-0







				1/8" Thick Wall (-0.02" to 0.02")

				1 1/2"	-0.062" to 0.062"	1 1/2"	-0.062" to 0.062"	1 1/4"	1 1/4"	0.050"/1 ft.	Red	-50 to 265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	4062N117	000000




						1/4" Thick Wall (-0.02" to 0.02")

						2"	-0.062" to 0.062"	2"	-0.062" to 0.062"	1 1/2"	1 1/2"	0.050"/1 ft.	Red	-50 to 265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	4062N118	000000

Multipurpose Flame-Retardant Garolite G-10/FR4 Rectangular Tubes

These rectangular tubes are flame retardant, machinable, and electrically insulating. They’re made of epoxy resin, making them good for use with printed circuit boards, insulating washers, and transformer components. With low moisture absorption, these tubes are often used as thermal insulators. Made with fiberglass fabric reinforcement, they’re strong and easier to machine than other glass cloth phenolics. Garolite G-10/FR4 is also called epoxy-grade industrial laminate and phenolic.

	Outside				Inside		Temp.							36"
	Wd.	Wd. Tolerance	Ht.	Ht. Tolerance	Wd.	Ht.	Min.	Max., ° F	Tensile Strength, psi	Impact Strength, ft·lbf/in	Hardness	For Use Outdoors	Mil. Spec.		Each
0.063" Thick Wall







				Green

				2.156"	-0.015" to 0.015"	1.156"	-0.015" to 0.015"	2.03"	1.03"	Not Rated	265	32,000 to 40,000	5.5 to 12	Rockwell M100 (Extra Hard)	Yes	MIL-I-24768/27	4501N14	0000000


				1/8" Thick Wall







								Green

								3/4"	-0.015" to 0.015"	3/4"	-0.015" to 0.015"	1/2"	1/2"	Not Rated	265	32,000 to 40,000	5.5 to 12	Rockwell M100 (Extra Hard)	Yes	MIL-I-24768/27	4501N17	000000


								1"	-0.015" to 0.015"	7/8"	-0.015" to 0.015"	3/4"	5/8"	Not Rated	265	32,000 to 40,000	5.5 to 12	Rockwell M100 (Extra Hard)	Yes	MIL-I-24768/27	4501N11	000000


								1/4" Thick Wall







												Green

												1 5/8"	-0.015" to 0.015"	1 1/4"	-0.015" to 0.015"	1 1/8"	3/4"	Not Rated	265	32,000 to 40,000	5.5 to 12	Rockwell M100 (Extra Hard)	Yes	MIL-I-24768/27	4501N12	000000