3/8" Drive Sockets | McMaster-Carr

Filter by

System of Measurement

Drive Size

Square Drive Size

Socket Shape

Bolt Clearance Type

Drive Style

Socket Style

Sold As

Overall Length

Drive Type

Socket Type

Number of Pieces

Tip Style

Finish

Container Type

Set Type

Wrench Opening Shape

Material

Wrench Style

Head Style

Bit Replaceable

REACH

Export Control Classification Number (ECCN)

DFARS Specialty Metals

RoHS

Forward

How can we improve?

217 Products

Sockets

6-Point Sockets

The hex shape achieves the best possible grip on hex fasteners to prevent rounding their points.

Stubby 6-Point Sockets

These short sockets fit spaces where height clearance is limited.

6-Point Flex Sockets

Pivot the head to access fasteners from an angle.

Fastener-Holding 6-Point Sockets

Hold fasteners securely in place as you drive them.

Extended 6-Point Flex Sockets

Eliminate the risk of your socket falling while reaching into your workspace with these flex sockets that have an integrated extension.

Bolt-Through 6-Point Sockets

Pair these sockets with a bolt-through ratchet wrench to reach nuts at the bottom of a long threaded rod or bolt which can pass through the socket and the head of the wrench.

12-Point Sockets

Electrical-Insulating 12-Point Sockets

Insulated to protect against accidental contact with live electrical circuits, these sockets are tested to 1,000 volts to meet IEC 60900.

12-Point Flex Sockets

Pivot the head to access fasteners from an angle.

8-Point Sockets

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

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.

Universal-Fit Sockets

Turn multiple shapes and sizes of fasteners with a single socket.

Hex Bit Sockets

Electrical-Insulating Hex Bit Sockets

Insulated to protect against accidental contact with live electrical circuits, these sockets are tested to 1,000 volts to meet ASTM F1505 and IEC 60900.

Stubby Hex Bit Sockets

The short bit on these sockets fits in spaces where height clearance is limited.

Extended-Reach Hex Bit Sockets

Extra-long bits allow access to hard-to-reach fasteners.

Dual-Drive Hex Bit Sockets

When vertical space is tight or you need an extra twist on your socket, use these dual drive hex bit sockets. They work with a standard square drive tool and a box or open end wrench.

Extended-Reach Ball-End Hex Bit Sockets

Extra-long bits allow access to hard-to-reach fasteners.

Ball-End Hex Bit Sockets

The ball end allows angled entry when you don't have exact alignment between the socket bit and fastener.

Slotted Bit Sockets

Wrench Heads

Reach nuts obstructed by a fluid line or other barrier with these wrench heads.

Secure-Grip Wrench Heads

Grip more of your fastener head with these wrench heads.

Box-End Wrench Heads

Attach one of these heads to your square-drive ratchet or torque wrench to extend its reach or to access spaces with limited vertical clearance.

Impact Sockets

6-Point Impact Sockets

Achieve the best possible grip on hex fasteners and prevent rounding.

Fastener-Holding 6-Point Impact Sockets

A magnet holds the fastener securely enough to drive self-tapping screws.

Thin-Wall 6-Point Impact Sockets

With a smaller OD than standard sockets, these fit between tightly spaced fasteners.

6-Point Flex Impact Sockets

Pivot the head to access fasteners from an angle.

12-Point Impact Sockets

The 12-point shape quickly positions on hex fasteners.

8-Point Impact Sockets

Quickly position these sockets on square fasteners.

Impact Hex Bit Sockets

These sockets are made to withstand the high torque and force of impact tools.

Stubby Impact Hex Bit Sockets

The short bit on these sockets fits in spaces where height clearance is limited.

Extended-Reach Impact Hex Bit Sockets

Extra-long bits help you access hard-to-reach fasteners.

Replacement Bits for Hex Bit Sockets

Switch out worn or damaged bits instead of replacing your entire bit socket.

Continuous-Duty Sockets

Continuous-Duty 6-Point Sockets

These sockets are designed to tolerate continuous use with power tools and impact tools in high-volume production and assembly.

Continuous-Duty Fastener-Holding 6-Point Sockets

A magnet holds the fastener securely enough to drive self-tapping screws.

Continuous-Duty Hex Bit Sockets

These sockets are designed to tolerate continuous use with power tools and impact tools in high-volume production and assembly.

Socket Sets

6-Point Socket Sets

Made in the U.S.A., these tools handle the toughest industrial applications, provide the best grip on fasteners, and have a superior finish.

Economy 6-Point Socket Sets

Suitable for occasional maintenance work, these sets are imported.

Bolt-Through 6-Point Socket Sets

Pair the sockets in these sets with the bolt-through ratchet wrench to reach nuts at the bottom of a long threaded rod or bolt.

Nonsparking 6-Point Socket Sets

Made of aluminum-bronze, these sockets satisfy OSHA requirements that specify nonsparking tools for locations where flammable vapors and combustible residues are present.

6-Point Flex Socket Sets

Access 6-point nuts and bolts in tight and awkward spaces—the heads on these sockets pivot.

Fastener-Holding 6-Point Socket Sets

Two spring-loaded balls inside these sockets firmly hold nuts and bolts in place as you turn them, including nonmagnetic fasteners like stainless steel screws.

12-Point Socket Sets

Made in the U.S.A., these tools handle the toughest industrial applications, provide the best grip on fasteners, and have a superior finish.

Economy 12-Point Socket Sets

Suitable for occasional maintenance work, these sets are imported.

12-Point Flex Socket Sets

Pivot the head to access fasteners from an angle.

Electrical-Insulating 12-Point Socket Sets

These sets organize what you need when working around live electrical circuits.

8-Point Socket Sets

With twice as many corners, 8-point sockets grab onto square-drive screws and nuts more quickly than 4-point sockets.

Hex Bit Socket Sets

Extended-Reach Hex Bit Socket Sets

Extra-long bits allow access to hard-to-reach fasteners.

Stubby Hex Bit Socket Sets

The short bit on these sockets fits in spaces where height clearance is limited.

Fastener-Holding Hex Bit Socket Sets

A spring-loaded ball on the bit holds fasteners in place as you drive them, including nonmagnetic fasteners like stainless steel screws.

Dual-Drive Hex Bit Socket Sets

In addition to a standard square drive, the sockets in these sets have a hex-shaped base so you can use a ratchet wrench along with an open-end or box wrench for additional leverage.

Extended-Reach Ball-End Hex Bit Socket Sets

Tighten or loosen hard-to-reach fasteners with the extra-long bits in these socket sets.

Ball-End Hex Bit Socket Sets

The ball end allows angled entry when you don't have exact alignment between the socket bit and fastener.

Maintenance Bit Socket Sets

Keep a convenient variety of drive styles and sizes of bit sockets on hand.

Box-End Wrench Head Sets

Attach one of the heads in these sets to a torque wrench for more leverage to loosen a stubborn fastener.

Wrench Head Sets

Reach nuts obstructed by a fluid line or other barrier with the wrench heads in these sets.

Ratcheting Wrench Head Sets

Connect one of the heads in these sets to a socket extension to reach an obstructed fastener, then turn the fastener without removing and repositioning the wrench head.

Impact Socket Sets

6-Point Impact Socket Sets

The hex shape grips hex fasteners and prevents rounding. These sockets are made to withstand the high torque and force of impact tools.

6-Point Flex Impact Socket Sets

Pivot the head to access fasteners from an angle.

Reversible 6-Point Impact Socket Sets

Carry fewer impact sockets—these five reversible impact sockets turn 10 fastener sizes. Flip the socket around to turn a different size.

Dual-Size 12-Point Impact Socket Sets

Use one socket to switch between two fastener sizes.

Impact Hex Bit Socket Sets

Use these sockets as an alternative to a screwdriver or L-key. They are made to withstand the high torque and force of impact tools.

Extended-Reach Impact Hex Bit Socket Sets

Extra-long bits help you access hard-to-reach fasteners.

Flex Impact Hex Bit Socket Sets

Pivot the head to access fasteners from an angle.

Bolt-Through Ratchet Wrenches

Pair these wrenches with a bolt-through socket to reach nuts at the bottom of a long threaded rod or bolt which can pass through the head of the wrench.

Socket Wrenches

T-Handle Socket Wrenches

Socket Wrenches

Flex-Head Socket Wrenches

Pivot the socket end to access hard-to-reach fasteners.

Socket Wrench Sets

These wrenches have one pivoting socket end and one open end.

Ratcheting Box Wrenches

Two-Head Deep-Offset Ratcheting Box Wrenches

The 25° offset heads give you additional clearance to turn hard-to-reach fasteners.

Two-Head Ratcheting Box Wrenches

Ratchet mechanisms allow you to turn fasteners in tight spaces without removing and repositioning the tool.

Ratcheting Box Wrenches

A ratchet mechanism allows you to turn fasteners in tight spaces without removing and repositioning the wrench.

Changeable-Head Torque Wrenches

Change heads to use these tools as an open-end, box, square drive, or hex-key wrench.

Impact Screwdrivers

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.