Grade G-7 Phenolic | McMaster-Carr

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Material Grade

System of Measurement

Thickness

Shape

Width

Maximum Temperature

Material

Length

Performance

Highly Electrically Insulating

Ultra Impact Resistant

Color

Diameter

Flexibility

Resin Material

Hardness Rating

Texture

Reinforcement Material

Fiberglass Fabric

Minimum Temperature

-40° F

Not Rated

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

Yes

For Use Outdoors

Environment

High Temperature

Export Control Classification Number (ECCN)

EAR99

RoHS

Compliant

DFARS Specialty Metals

Exempt

REACH

Compliant

Not Compliant

Tensile Strength

18,000 psi to 27,700 psi

Compressive Strength Range

44,800 psi to 45,000 psi

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

Ultra-High-Temperature Arc-Resistant Garolite G-7 Sheets and Bars

Garolite G-7 withstands temperatures up to 425° F—higher than any other grade of Garolite. While not as strong as Garolite G-9 sheets, these sheets and bars offer better arc resistance in dry environments and a higher level of electrical insulation. They are constructed of a silicone resin with fiberglass fabric reinforcement. Garolite G-7 is sometimes called silicone-grade laminate, phenolic, and Bakelite. Use it to fabricate high-frequency telecommunication equipment, transformers, and other parts that require a high heat tolerance.

Sheet

	Temp.								4" × 6"		12" × 12"		12" × 24"		24" × 24"		24" × 36"		36" × 48"
	Min.	Max., ° F	Tensile Strength, psi	Impact Strength, ft·lbf/in	Hardness	For Use Outdoors	Mil. Spec.	Flammability Rating		Each		Each		Each		Each		Each		Each
1/32" Thick (-0.005" to 0.005")







				Off-White

				Not Rated	425	18,000 to 27,700	6.5 to 19.1	Rockwell M65 (Hard)	No	MIL-I-24768/17	UL 94 V-0	———	0	8641K113	000000	8641K114	000000	8641K115	0000000	8641K116	0000000	8641K117	0000000


				1/16" Thick (-0.008" to 0.008")







								Off-White

								Not Rated	425	18,000 to 27,700	6.5 to 19.1	Rockwell M65 (Hard)	No	MIL-I-24768/17	UL 94 V-0	———	0	8641K121	00000	8641K141	000000	8641K161	000000	8641K181	000000	8641K211	000000


								1/8" Thick (-0.012" to 0.012")







												Off-White

												Not Rated	425	18,000 to 27,700	6.5 to 19.1	Rockwell M65 (Hard)	No	MIL-I-24768/17	UL 94 V-0	———	0	8641K122	000000	8641K142	000000	8641K162	000000	8641K182	000000	8641K212	000000


												3/16" Thick (-0.019" to 0.019")







																Off-White

																Not Rated	425	18,000 to 27,700	6.5 to 19.1	Rockwell M65 (Hard)	No	MIL-I-24768/17	UL 94 V-0	———	0	8641K123	000000	8641K143	000000	8641K163	000000	8641K183	000000	———	0


																1/4" Thick (-0.022" to 0.022")







																				Off-White

																				Not Rated	425	18,000 to 27,700	6.5 to 19.1	Rockwell M65 (Hard)	No	MIL-I-24768/17	UL 94 V-0	7017K41	000000	8641K124	000000	8641K144	000000	8641K164	000000	8641K184	000000	8641K214	00000000


3/8" Thick (-0.03" to 0.03")







																				Off-White

																				Not Rated	425	18,000 to 27,700	6.5 to 19.1	Rockwell M65 (Hard)	No	MIL-I-24768/17	UL 94 V-0	———	0	8641K126	000000	8641K146	000000	8641K166	000000	8641K186	00000000	8641K216	00000000


																				1/2" Thick (-0.033" to 0.033")







																				Off-White

																				Not Rated	425	18,000 to 27,700	6.5 to 19.1	Rockwell M65 (Hard)	No	MIL-I-24768/17	UL 94 V-0	7017K61	00000	8641K127	000000	8641K147	000000	8641K167	000000	8641K187	00000000	———	0


																				3/4" Thick (-0.043" to 0.043")







																				Off-White

																				Not Rated	425	18,000 to 27,700	6.5 to 19.1	Rockwell M65 (Hard)	No	MIL-I-24768/17	UL 94 V-0	7017K71	000000	8641K133	000000	8641K134	000000	8641K135	00000000	8641K136	00000000	———	0


																				1" Thick (-0.049" to 0.049")







																				Off-White

																				Not Rated	425	18,000 to 27,700	6.5 to 19.1	Rockwell M65 (Hard)	No	MIL-I-24768/17	UL 94 V-0	7017K81	000000	8641K153	000000	8641K154	00000000	———	0	———	0	———	0

Bar

	Temp.								1" × 24"		1" × 48"		1 1/2" × 24"		1 1/2" × 48"		2" × 24"		2" × 48"
	Min.	Max., ° F	Tensile Strength, psi	Impact Strength, ft·lbf/in	Hardness	For Use Outdoors	Mil. Spec.	Flammability Rating		Each		Each		Each		Each		Each		Each
1/8" Thick (-0.012" to 0.012")







				Off-White

				Not Rated	425	18,000 to 27,700	6.5 to 19.1	Rockwell M65 (Hard)	No	MIL-I-24768/17	UL 94 V-0	6125N111	000000	6125N112	000000	6125N113	000000	6125N114	000000	6125N115	000000	6125N116	000000


				1/4" Thick (-0.022" to 0.022")







								Off-White

								Not Rated	425	18,000 to 27,700	6.5 to 19.1	Rockwell M65 (Hard)	No	MIL-I-24768/17	UL 94 V-0	6125N117	00000	6125N118	00000	6125N119	00000	6125N121	000000	6125N122	00000	6125N123	000000


								1/2" Thick (-0.036" to 0.036")







												Off-White

												Not Rated	425	18,000 to 27,700	6.5 to 19.1	Rockwell M65 (Hard)	No	MIL-I-24768/17	UL 94 V-0	6125N124	00000	6125N125	000000	6125N126	00000	6125N127	000000	6125N128	000000	6125N129	000000


												3/4" Thick (-0.043" to 0.043")







																Off-White

																Not Rated	425	18,000 to 27,700	6.5 to 19.1	Rockwell M65 (Hard)	No	MIL-I-24768/17	UL 94 V-0	6125N131	00000	6125N132	000000	6125N133	000000	6125N134	000000	6125N135	000000	6125N136	000000


																1" Thick (-0.049" to 0.049")







																				Off-White

																				Not Rated	425	18,000 to 27,700	6.5 to 19.1	Rockwell M65 (Hard)	No	MIL-I-24768/17	UL 94 V-0	6125N137	000000	6125N138	000000	6125N139	000000	6125N141	000000	6125N142	000000	6125N143	000000

Composite Material Selector Packs

Includes one piece of each material listed.

	No. of Pieces	Material Grade		Each
1/32" Thick



	2"	10	GPO3 Fiberglass, Garolite CE, Garolite G-3, Garolite G-7, Garolite G-9, Garolite G-10, Garolite G-11, Garolite LE, Garolite XX, Garolite XXX	5331K3	000000

Ultra-High-Temperature Arc-Resistant Garolite G-7 Rods

Choose these Garolite G-7 rods for their high heat tolerance—they withstand temperatures up to 425° F. While not as strong as Garolite G-9 rods, they offer better arc resistance in dry environments and a higher level of electrical insulation. These rods are constructed of a silicone resin with fiberglass fabric reinforcement. Garolite G-7 is sometimes called silicone-grade laminate, phenolic, and Bakelite. Use it to fabricate high-frequency telecommunication equipment and parts that require a high tolerance to heat.

		Temp., ° F
Dia.	Dia. Tolerance	Min.	Max.	Tensile Strength, psi	Impact Strength, ft·lbf/in	Hardness	For Use Outdoors	Mil. Spec.	Flammability Rating		1 ft.	4 ft.







			Off-White

			1/4"	-0.003" to 0.003"	-40	425	18,000 to 27,700	6.5 to 19.1	Rockwell M105 (Extra Hard)	No	MIL-I-24768/17	UL 94 V-0	8524K61	000000	000000


			5/16"	-0.003" to 0.003"	-40	425	18,000 to 27,700	6.5 to 19.1	Rockwell M105 (Extra Hard)	No	MIL-I-24768/17	UL 94 V-0	8524K62	00000	00000
			3/8"	-0.003" to 0.003"	-40	425	18,000 to 27,700	6.5 to 19.1	Rockwell M105 (Extra Hard)	No	MIL-I-24768/17	UL 94 V-0	8524K63	00000	00000
			1/2"	-0.003" to 0.003"	-40	425	18,000 to 27,700	6.5 to 19.1	Rockwell M105 (Extra Hard)	No	MIL-I-24768/17	UL 94 V-0	8524K64	00000	00000
			5/8"	-0.003" to 0.003"	-40	425	18,000 to 27,700	6.5 to 19.1	Rockwell M105 (Extra Hard)	No	MIL-I-24768/17	UL 94 V-0	8524K65	00000	000000
			3/4"	-0.003" to 0.003"	-40	425	18,000 to 27,700	6.5 to 19.1	Rockwell M105 (Extra Hard)	No	MIL-I-24768/17	UL 94 V-0	8524K66	00000	000000
			1"	-0.003" to 0.003"	-40	425	18,000 to 27,700	6.5 to 19.1	Rockwell M105 (Extra Hard)	No	MIL-I-24768/17	UL 94 V-0	8524K67	00000	000000
			1 1/2"	-0.003" to 0.003"	-40	425	18,000 to 27,700	6.5 to 19.1	Rockwell M105 (Extra Hard)	No	MIL-I-24768/17	UL 94 V-0	8524K68	000000	000000