Keep Nuts | McMaster-Carr

	For Use In For Use In

Fiberglass

Carbon Fiber

Garolite

	Material Material

Plastic

Stainless Steel

Steel

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

10-24

10-32

1/4"-20

	Installed Length Installed Length

	Threaded Insert Type Threaded Insert Type


Press Fit	Hammer In

	For Minimum Material Thickness For Minimum Material Thickness

	Drill Bit Size Drill Bit Size

	Rows of Teeth Rows of Teeth

	For Maximum Hole Diameter For Maximum Hole Diameter

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

DFARS Specialty Metals
COTS-Exempt

	Tensile Strength Tensile Strength

12,000 psi

Not Rated

	Thread Type Thread Type

UNC

UNF

Metric

	Thread Pitch Thread Pitch

0.7 mm

0.8 mm

1 mm

	Thread Fit Thread Fit

Class 2B

Class 6H

	Thread Spacing Thread Spacing

Coarse

Fine

	Color Color

	Gray
	White

	Barrel Length Barrel Length

3/16"

3/8"

5.6mm

	Flange Diameter Flange Diameter

1/2"

3/4"

19.1mm

	Flange Thickness Flange Thickness

0.04"

0.05"

1.2mm

	Barrel Diameter Barrel Diameter

0.243"

0.305"

7.7mm

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

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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