3/8" Square Drive Sockets | McMaster-Carr

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System of Measurement

Drive Size

Square Drive Size

Bolt Clearance Type

Socket Shape

Drive Style

External 12-Point

External Pentagon

External Square

External Torx Plus

Tamper-Resistant Hex

Tamper-Resistant Torx

Tamper-Resistant Torx Plus

OD

Socket Style

Sold As

Overall Length

31/32" to 3 1/16"

Socket Type

Air Hammer Adapter

Finger-Tightening Adapter

Hex Head Adapter

Hex Shank-to-Square Drive Adapter

Quick-Change Adapter

Ratchet Adapter

Secure-Hold Extension

Secure-Hold Socket Adapter

Square Drive Size Adapter

Torque-and-Angle Measuring Adapter

Torque-Limiting Adapter

Finish

Magnesium Phosphate Coated

Manganese Phosphate Coated

Phosphate Coated

Drive Type

Thread Size

Material

Stainless Steel

Length

31/32" to 3 1/16"

Tip Style

Number of Pieces

Nut Diameter

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

RoHS

REACH

DFARS Specialty Metals

Container Type

Fabric Roll-Up Pouch

Metal Clip Rail

Plastic Clip Rail

Export Control Classification Number (ECCN)

Wrench Opening Shape

12-Point Sure Grip

How can we improve?

1,404 Products

Fastening and Joining

Sockets

Turn fasteners with an external drive style without slipping and damaging the drive

Bit Sockets

Turn fasteners with an internal drive style without slipping and damaging the drive

Socket Adapters

Socket Adapters

Make your socket more versatile, from converting the drive to limiting torque

Wrench Heads

Attach to your ratchet wrench and socket extension to turn fasteners where clearance is limited

Ratchet Wrenches

Ratchet Wrenches

Adjust fasteners in tight spaces without removing and repositioning the wrench

Socket Extensions

Socket Extensions

Lengthen sockets to turn hard-to-reach fasteners

Ratchet Wrench/Screwdrivers

Ratchet Wrench/Screwdrivers

Switch between sockets and bits to turn a variety of fasteners with a single tool

Socket Retaining Rings

Socket Retaining Rings

Secure sockets and adapters to impact tools

Torque Wrenches

Torque Wrenches

Avoid overtightening and damaging fasteners by applying a specific torque

Wrench Handles

Generate extra torque to loosen stubborn fasteners; also known as breaker bars

Oil Filter Sockets

Oil Filter Sockets

Twist with a ratchet wrench to adjust filters and other round objects in tight spots

Impact Wrenches

Impact Wrenches

Maximize torque to break frozen bolts free and drive fasteners more quickly than other wrenches

Socket Drivers

Tighten and loosen sockets from above when there isn't room to swing a standard wrench

Impact Drivers

More powerful than drills to drive screws through dense material and loosen stuck fasteners

Bit Adapters

Connect a variety of bits to drills, powered screwdrivers, ratchet wrenches, and other turning tools

Speeder Handles

Speeder Handles

Crank the handle to fasten nuts and bolts quickly

Screw, Pipe, and Stud Extractors

Screw, Pipe, and Stud Extractors

Remove broken screws, pipes, and studs without damaging the threads around them

Containers, Storage, and Furniture

Socket Organizers

Socket Organizers

Arrange sockets at your workstation or carry them neatly around your facility

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)