Square-Head Wrenches | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	Size Size

	For Drive Style For Drive Style


External Square	External Hex

External 8- Point	Square

	Opening Shape Opening Shape


4-Point	Rounded

Hex	Square

	Wrench Style Wrench Style


Socket	Open End

Box	Square Drive

	Square Drive Size Square Drive Size

	Overall Length Overall Length

	Individual/Set Individual/Set

Individual

Set

	Socket Shape Socket Shape

	Head Style Head Style


Standard	Offset

	Material Material

Steel

Iron

Aluminum

	Socket Style Socket Style


Standard	Offset

Bit

	Finish Finish

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

DFARS Specialty Metals
COTS-Exempt

	OD OD

	Head Thickness Head Thickness

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

RoHS Compliant

RoHS Compliant with
Exemptions

	Number of Heads Number of Heads

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

REACH Compliant

	Bolt Clearance Style Bolt Clearance Style


Standard	Deep

Extra Deep

	Wrench Type Wrench Type

Standard

Torque

	Drive Type Drive Type

Manual

Impact

	Opening Angle Opening Angle

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587 Products

Square Drive Sockets and Ratchet Wrenches

4-Point Sockets

Also known as pipe plug sockets, these sockets have a square shape that provides the best possible grip on square fasteners and prevents rounding.

8-Point Sockets

Quickly position these sockets on square and external 8-point fasteners.

Spanner Sockets

For easy tightening and loosening, these sockets have pins that grip the slotted sides on bearing nuts.

Tight-Clearance Offset Sockets

Often used with an extension, these sockets turn fasteners and fittings in obstructed areas that a regular socket can't reach. They are also known as crowfoot wrenches.

Adjustable Tight-Clearance Offset Sockets

Turn the knob to adjust the jaws and fit a range of fastener sizes.

Square Bit Sockets

These sockets are also known as Robertson bits.

8-Point Impact Sockets

Quickly position these sockets on square fasteners.

Extra-Deep 8-Point Impact Sockets

Extra length allows access to fasteners on long bolts.

4-Point Impact Sockets

The square shape provides the best possible grip on square fasteners and prevents rounding.

Wheel Bearing Locknut Socket Sets

Shaped and sized for compatibility with wheel bearing locknuts on trucks and trailers, the sockets in these sets make it easy to install and remove locknuts.

8-Point Socket Sets

Quickly position these sockets on square fasteners.

Tight-Clearance Offset Socket Sets

Often used with an extension, these sockets turn fasteners and fittings in obstructed areas that a regular socket can't reach. They are also known as crowfoot wrenches.