No. 4 Drive Sockets | McMaster-Carr

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9 Products

Tri-Groove Sockets

Square Drive

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

1/4" Square Drive
Drive Size	Overall Lg.	OD	For Fastener Type	For Screw Size (Head Dia.)	Material		Each
No. 4	1"	31/64"	Screws	No. 4 Standard (0.13") No. 6 Countersunk (0.268")	Black-Oxide Steel	0000000	000000

Phillips Bit Sockets

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

Sockets						Replacement Bits
Drive Size	Overall Lg.	Material	Bit Replaceable		Each		Each
1/4" Square Drive
No. 4	1 1/8"	Chrome-Plated Steel	No	00000000	000000	000000	00
3/8" Square Drive
No. 4	2 1/16"	Chrome-Plated Steel	Yes	00000000	00000	00000000	00000
1/2" Square Drive
No. 4	2 3/16"	Chrome-Plated Steel	No	00000000	00000	000000	00

Pozidriv® Bit Sockets

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

1/2" Square Drive
Drive Size	Overall Lg.	Material	Bit Replaceable	Specifications Met		Each
No. 4	2 3/8"	Chrome-Plated Steel	No	ISO 1174, ISO 8764-1	00000000	000000

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

Impact Screwdrivers


	Phillips
	Slotted

Break stuck screws free using screwdriver bits. Strike the end of the handle with a hammer to turn the bit and tighten or loosen fasteners. Use these tools as an impact wrench without the bit adapter.

3/8" Square Drive Size
Number of Sizes	Sizes Included	Drive Size	For Bit Hex Shank Size	Overall Lg.	Material	Finish	Bit Material		Each
5	Phillips: No. 1, No. 2, No. 3, No. 4 Slotted: 3/8"	No. 1, No. 2, No. 3, No. 4, 3/8"	5/16"	5 1/4"	Steel	Black Oxide	Steel	000000	000000
1/2" Square Drive Size
5	Phillips: No. 1, No. 2, No. 3, No. 4 Slotted: 3/8"	No. 1, No. 2, No. 3, No. 4, 3/8"	5/16"	5 1/4"	Steel	Black Oxide	Steel	0000000	00000