Inserts for Fiberglass | McMaster-Carr

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25 Products

Press-Fit Threaded Inserts for Composites

Press these inserts into a drilled hole and the flexible metal teeth anchor them in the material. Use them with carbon fiber, fiberglass, and garolite. Made of stainless steel and nylon plastic, they have excellent corrosion resistance.

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

Inch

Inserts							Installation Tools
Thread Size	Installed Lg.	Rows of Teeth	Drill Bit Size	For Max. Hole Dia.		Each		Each
18-8 Stainless Steel and Nylon Plastic
10-24	0.236"	2	12 mm	12 mm	000000000	00000	000000000	000000
10-24	0.335"	4	12 mm	12 mm	000000000	0000	000000000	00000
1/4"-20	0.197"	1	12 mm	12 mm	000000000	0000	000000000	00000
1/4"-20	0.236"	2	12 mm	12 mm	000000000	0000	000000000	00000
1/4"-20	0.315"	4	12 mm	12 mm	000000000	0000	000000000	00000
1/4"-20	0.591"	4	12 mm	12 mm	000000000	0000	000000000	00000

Metric

Inserts								Installation Tools
Thread Size	Thread Pitch, mm	Installed Lg., mm	Rows of Teeth	Drill Bit Size	For Max. Hole Dia.		Each		Each
18-8 Stainless Steel and Nylon Plastic
M4	0.7	5	1	12 mm	12 mm	000000000	00000	000000000	000000
M4	0.7	6	2	12 mm	12 mm	000000000	0000	000000000	00000
M4	0.7	8.5	4	12 mm	12 mm	000000000	0000	000000000	00000
M5	0.8	5	1	12 mm	12 mm	000000000	0000	000000000	00000
M5	0.8	6	2	12 mm	12 mm	000000000	0000	000000000	00000
M5	0.8	8.5	4	12 mm	12 mm	000000000	0000	000000000	00000
M6	1	5	1	12 mm	12 mm	000000000	0000	000000000	00000
M6	1	6	2	12 mm	12 mm	000000000	0000	000000000	00000
M6	1	8.5	4	12 mm	12 mm	000000000	0000	000000000	00000
M6	1	15	4	12 mm	12 mm	000000000	0000	000000000	00000

Tee Nut Inserts for Fiberglass

A wide flange distributes the load over a large area. Hammer these inserts into a drilled hole to install. With only three short prongs, they reduce the risk of splitting or cracking fiberglass. They’re zinc-plated steel for mild corrosion resistance.

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

Inch

		Barrel		Flange
Thread Size	Installed Lg.	Dia.	Lg.	Dia.	Thick.	Drill Bit Size	For Max. Hole Dia.	Pkg. Qty.		Pkg.
Zinc-Plated Steel
10-32	0.2265"	0.243"	3/16"	1/2"	0.04"	1/4"	1/4"	100	000000000	000000
10-32	0.5"	0.243"	3/8"	1/2"	0.04"	1/4"	1/4"	25	000000000	0000
1/4"-20	0.235"	0.305"	3/16"	3/4"	0.05"	5/16"	5/16"	50	000000000	00000

Metric

			Barrel, mm		Flange, mm
Thread Size	Thread Pitch, mm	Installed Lg., mm	Dia.	Lg.	Dia.	Thick.	Drill Bit Size	For Max. Hole Dia.	Pkg. Qty.		Pkg.
Zinc-Plated Steel
M6	1	6.8	7.7	5.6	19.1	1.2	7.9 mm	7.9mm	25	000000000	000000