Tri-Groove Drivers | McMaster-Carr

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	For Drive Style For Drive Style

	Tri-Groove

	Socket Shape Socket Shape

	Tri-Groove

	System of Measurement System of Measurement

Inch

	For Screw Size For Screw Size

	Socket Style Socket Style

	Standard

	Square Drive Size Square Drive Size

1/4"

3/8"

1/2"

	Socket Type Socket Type

	Socket

	Individual/Set Individual/Set

Individual

Set

	Bolt Clearance Style Bolt Clearance Style

	Standard

	Shank Type Shank Type

	Quick- Change Hex

	Overall Length Overall Length

	Size Size

	Driver Style Driver Style

	Bit

	Material Material

Steel

	Finish Finish

Black Oxide

	For Nut Size For Nut Size

	Tip Style Tip Style

	Standard

	Overall Diameter Overall Diameter

	Hex Shank Size Hex Shank Size

1/4"

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

DFARS Specialty Metals
COTS-Exempt

	Drive Type Drive Type

Manual

	Number of Pieces Number of Pieces

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

RoHS Compliant

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

REACH Compliant

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13 Products

Tri-Groove Bits

Grip the indentations on the head of tri-groove fasteners. These bits have a groove in the shank to fit directly into power tools without an adapter.

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

	Overall
For Screw Size	Lg.	Dia.	Material		Each
1/4" Hex Shank Size for Power Tools
No. 1, No. 2, No. 3, No. 4	1 3/8"	3/8"	Steel	0000000	000000
No. 5, No. 6, No. 7, No. 8, No. 9, No. 10, No. 11	1 1/4"	1/2"	Steel	0000000	00000
No. 8, No. 9, No. 10, No. 11, No. 12, 1/4"	1 1/4"	7/8"	Steel	0000000	00000
No. 12, 5/16"	1 1/4"	3/4"	Steel	0000000	00000

Tri-Groove Bit Sets

Grip the indentations on the head of tri-groove fasteners. These bits have a groove in the shank and fit directly into power tools without an adapter.

1/4" Hex Shank Size for Power Tools
Components Included	Bits Included	Material	Bit Material	Container Type		Each
4 Bits	Tri-Groove: 0.375" O'all Dia. for No. 1-No. 8 (1 3/8" O'all Lg.) Tri-Groove: 0.5" O'all Dia. for No. 5-No. 11 (1 1/4" O'all Lg.) Tri-Groove: 0.75" O'all Dia. for No. 12-No. 13, 5/16" (1 1/4" O'all Lg.) Tri-Groove: 0.875" O'all Dia. for No. 8-No. 12, 1/4" (1 1/4" O'all Lg.)	Steel	High-Speed Steel	Plastic Pouch	0000000	000000

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
Size	Overall Lg.	OD	For Fastener Type	For Screw Size (Head Dia.)	For Nut Size (Dia.)	Material	Finish		Each
No. 4	1"	31/64"	Screws	No. 4 Standard (0.13") No. 6 Countersunk (0.268")	__	Steel	Black Oxide	0000000	000000
No. 6	1"	31/64"	Screws	No. 6, No. 8 Standard (0.208") No. 8, No. 10 Countersunk (0.372")	__	Steel	Black Oxide	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")	Steel	Black Oxide	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")	Steel	Black Oxide	0000000	00000
No. 30	1 1/2"	31/32"	Nuts	__	3/8", 5/16" (0.864")	Steel	Black Oxide	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)	Steel	Black Oxide	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