GPO3 Fiberglass Squares | McMaster-Carr

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System of Measurement

Thickness

Width

Length

Shape

Color

Performance

Highly Electrically Insulating

Ultra Impact Resistant

Material

Flexibility

Maximum Temperature

Backing Type

Hardness Rating

Texture

Material Grade

Outside Width

Clarity

Wall Thickness

Resin Material

For Use Outdoors

Hardness

Barcol 50

RoHS

Compliant

Dielectric Strength

200 V/mil to 600 V/mil

REACH

Compliant

DFARS Specialty Metals

Exempt

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

Yes

Export Control Classification Number (ECCN)

EAR99

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91 Products

About Composites

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

Arc-Resistant GPO3 Fiberglass Sheets and Strips

Often used for electrical applications in humid environments, these GPO3 fiberglass sheets and strips are arc and track resistant. They offer better electrical insulation properties than FRP fiberglass. Made of fiberglass-reinforced polyester, they're also called polyester-grade industrial laminate.

Sheets

	Thk.	Thk. Tolerance	Flatness Tolerance	Color	Max. Temp., ° F	Tensile Strength, psi	Impact Strength, ft·lbf/in	Hardness	For Use Outdoors	Flammability Rating		Each
12" Wide × 12" Long



		1/32"	-0.008" to 0.008"	0.600"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	—	8549K79	00000


		1/16"	-0.008" to 0.008"	0.300"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K42	0000
		3/32"	-0.009" to 0.009"	0.300"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K43	00000
		1/8"	-0.01" to 0.01"	0.120"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K44	00000
		3/16"	-0.013" to 0.013"	0.120"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K45	00000
		1/4"	-0.015" to 0.015"	0.120"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K46	00000
		3/8"	-0.02" to 0.02"	0.060"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K47	00000
		1/2"	-0.024" to 0.024"	0.060"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K48	00000
		3/4"	-0.029" to 0.029"	0.060"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K59	00000
		1"	-0.033" to 0.033"	0.03"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K69	00000


		12" Wide × 24" Long



				1/32"	-0.008" to 0.008"	1.200"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	—	8549K89	00000


				1/16"	-0.008" to 0.008"	0.600"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K52	00000
				3/32"	-0.009" to 0.009"	0.600"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K53	00000
				1/8"	-0.01" to 0.01"	0.240"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K54	00000
				3/16"	-0.013" to 0.013"	0.240"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K55	00000
				1/4"	-0.015" to 0.015"	0.240"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K56	00000
				3/8"	-0.02" to 0.02"	0.120"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K57	00000
				1/2"	-0.024" to 0.024"	0.120"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K58	00000
				3/4"	-0.029" to 0.029"	0.120"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K92	000000
				1"	-0.033" to 0.033"	0.060"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K93	000000


				24" Wide × 24" Long



						1/32"	-0.008" to 0.008"	1.200"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	—	8549K97	00000


						1/16"	-0.008" to 0.008"	0.600"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K62	00000
						3/32"	-0.009" to 0.009"	0.600"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K63	00000
						1/8"	-0.01" to 0.01"	0.240"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K64	00000
						3/16"	-0.013" to 0.013"	0.240"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K65	00000
						1/4"	-0.015" to 0.015"	0.240"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K66	00000
						3/8"	-0.02" to 0.02"	0.120"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K67	000000
						1/2"	-0.024" to 0.024"	0.120"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K68	000000
						3/4"	-0.029" to 0.029"	0.120"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K95	000000
						1"	-0.033" to 0.033"	0.060"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K96	000000


						24" Wide × 36" Long



								1/32"	-0.008" to 0.008"	1.800"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	—	8549K98	00000


								1/16"	-0.008" to 0.008"	0.900"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K72	00000
								3/32"	-0.009" to 0.009"	0.900"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K73	00000
								1/8"	-0.01" to 0.01"	0.360"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K74	00000
								3/16"	-0.013" to 0.013"	0.360"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K75	00000
1/4"								-0.015" to 0.015"	0.360"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K76	00000
3/8"	-0.02" to 0.02"							0.180"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K77	000000
1/2"	-0.024" to 0.024"							0.180"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K78	000000
3/4"	-0.029" to 0.029"							0.180"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K222	000000
1"	-0.033" to 0.033"							0.090"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K223	000000


36" Wide × 72" Long



								1/32"	-0.008" to 0.008"	3.600"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	—	8549K99	000000


								1/16"	-0.008" to 0.008"	1.800"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K82	000000
								3/32"	-0.009" to 0.009"	1.800"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K83	000000
								1/8"	-0.01" to 0.01"	0.720"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K84	000000
								3/16"	-0.013" to 0.013"	0.720"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K85	000000
								1/4"	-0.015" to 0.015"	0.720"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K86	000000
		3/8"						-0.02" to 0.02"	0.360"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K87	000000
		1/2"	-0.024" to 0.024"					0.360"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K88	000000
		3/4"	-0.029" to 0.029"					0.360"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K225	000000
		1"	-0.033" to 0.033"					0.180"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K226	000000


		48" Wide × 96" Long



								1/16"	-0.008" to 0.008"	2.400"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K311	000000


								3/32"	-0.009" to 0.009"	2.400"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K321	000000
								1/8"	-0.01" to 0.01"	0.960"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K331	000000
								3/16"	-0.013" to 0.013"	0.960"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K341	000000
								1/4"	-0.015" to 0.015"	0.960"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K351	000000
								3/8"	-0.02" to 0.02"	0.480"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K361	000000
								1/2"	-0.024" to 0.024"	0.480"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K371	000000
				3/4"				-0.029" to 0.029"	0.480"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K381	00000000
				1"	-0.033" to 0.033"			0.240"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	8549K391	00000000

Strips

	Thk. Tolerance	Flatness Tolerance	Color	Max. Temp., ° F	Tensile Strength, psi	Impact Strength, ft·lbf/in	Hardness	For Use Outdoors	Flammability Rating		Each
3" Wide × 36" Long



	1/8"	-0.01" to 0.01"	0.360"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K11	000000


	1/4"	-0.015" to 0.015"	0.360"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K12	00000
	3/8"	-0.02" to 0.02"	0.180"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K13	00000
	1/2"	-0.024" to 0.024"	0.180"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K14	00000
	1"	-0.033" to 0.033"	0.090"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K16	00000


	3" Wide × 72" Long



			1/8"	-0.01" to 0.01"	0.720"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K21	00000


			1/4"	-0.015" to 0.015"	0.720"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K22	00000
			3/8"	-0.02" to 0.02"	0.360"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K23	00000
			1/2"	-0.024" to 0.024"	0.360"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K24	00000
			1"	-0.033" to 0.033"	0.180"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K26	00000


			6" Wide × 36" Long



					1/8"	-0.01" to 0.01"	0.360"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K31	00000


					1/4"	-0.015" to 0.015"	0.360"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K32	00000
					3/8"	-0.02" to 0.02"	0.180"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K33	00000
					1/2"	-0.024" to 0.024"	0.180"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K34	00000
					1"	-0.033" to 0.033"	0.090"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K36	00000


					6" Wide × 72" Long



							1/8"	-0.01" to 0.01"	0.720"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K41	00000


							1/4"	-0.015" to 0.015"	0.720"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K42	00000
							3/8"	-0.02" to 0.02"	0.360"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K43	00000
							1/2"	-0.024" to 0.024"	0.360"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K44	00000
							1"	-0.033" to 0.033"	0.180"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K46	000000


							12" Wide × 36" Long



									1/8"	-0.01" to 0.01"	0.360"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K51	00000


									1/4"	-0.015" to 0.015"	0.360"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K52	00000
									3/8"	-0.02" to 0.02"	0.180"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K53	00000
									1/2"	-0.024" to 0.024"	0.180"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K54	00000
									1"	-0.033" to 0.033"	0.090"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K56	000000


12" Wide × 72" Long



									1/8"	-0.01" to 0.01"	0.720"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K61	00000


									1/4"	-0.015" to 0.015"	0.720"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K62	00000
									3/8"	-0.02" to 0.02"	0.360"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K63	000000
									1/2"	-0.024" to 0.024"	0.360"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K64	000000
									1"	-0.033" to 0.033"	0.180"	Red	265	10,000 to 15,000	8.2 to 12	Barcol 50 (Hard)	No	UL 94 V-0	3345K66	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