T-Groove Sockets | McMaster-Carr

	Square Drive Size Square Drive Size

1/4"

3/8"

1/2"

	For Nut Size For Nut Size

	Size Size

	Individual/Set Individual/Set

Individual

Set

	For Screw Size For Screw Size

	For Nut Diameter For Nut Diameter

	For Fastener Type For Fastener Type

Nuts

Screws

	OD OD

	Overall Length Overall Length

1 1/4"

1 1/2"

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

DFARS Specialty Metals
COTS-Exempt

	For Screw Head Style For Screw Head Style

Standard

Countersunk

	For Screw Head Diameter For Screw Head Diameter

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

RoHS Compliant

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8 Products

Tri-Groove Sockets

Square Drive

Hex Drive

Grip the indentations around the outside of tri-groove fasteners. These sockets are for hand-driven use only.

Hex-drive sockets are specialty sockets that require the use of another 1" socket when used with a ratchet wrench.

1/4" Square Drive
Drive Size	Overall Lg.	OD	For Fastener Type	For Screw Size (Head Dia.)	For Nut Size (Dia.)	Finish; Material		Each
No. 4	1"	31/64"	Screws	No. 4 Standard (0.13") No. 6 Countersunk (0.268")	__	Black Oxide Steel	0000000	000000
No. 6	1"	31/64"	Screws	No. 6, No. 8 Standard (0.208") No. 8, No. 10 Countersunk (0.372")	__	Black Oxide Steel	0000000	00000
No. 10	1"	31/64"	Screws and Nuts	1/4", No. 10, No. 12 Standard (0.334") 1/4" Countersunk (0.492")	No. 6, No. 8 (0.406")	Black Oxide Steel	0000000	00000
3/8" Square Drive
No. 20	1"	47/64"	Screws and Nuts	5/16" Standard (0.585")	1/4", No. 10 (0.661")	Black Oxide Steel	0000000	00000
No. 30	1 1/2"	31/32"	Nuts	__	3/8", 5/16" (0.864")	Black Oxide Steel	0000000	00000
1/2" Square Drive
1/2"	1 1/4"	1 1/4"	Nuts	__	1/2", M12, M14 (12mm, 0.5", 14mm)	Steel	0000000	00000
1" Hex Drive
1"	2"	1 5/8"	Nuts	__	M16, M20 (0.625", 16mm, 18mm, 0.75", 20mm)	Black Oxide Steel	0000000	00000

Tri-Groove Socket Sets

Grip the indentations around the outside of tri-groove fasteners.

1/4" Square Drive—Steel
No. of Pieces	Components Included	Includes	Finish		Each
4	3 Sockets 1 Drive Tool	Standard Socket: No. 4 (For No. 4 Standard Screws and No. 6 Countersunk Screws) Standard Socket: No. 6 (For Nos. 6 and 8 Standard Screws and Nos. 8 and 10 Countersunk Screws) Standard Socket: No. 10 (For Nos. 10, 12, and 1/4" Standard Screws; 1/4" Countersunk Screws; and Nos. 6 and 8 Nuts) 8" Long Socket Screwdiver Handle	Black Oxide	0000000	000000