3/8" Hex Drivers | McMaster-Carr

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Drive Style

Drilled Spanner

External 12-Point

External Spline

External Square

Tamper-Resistant Hex

Tamper-Resistant Torx

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System of Measurement

Tip Style

Overall Length

15/16" to 1 1/8"

1 1/4" to 1 3/8"

1 5/16" to 4 11/16"

1 5/16" to 6 15/16"

Square Drive Size

Driver Style

Shank Type

Knurled-End Hex

Quick-Change Hex

Number of Pieces

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Container Type

Compartmented Metal Box

Compartmented Plastic Box

Fabric Roll-Up Pouch

Metal Clip Rail

Plastic Clip Rail

Plastic Organizer

Grip Style

Bolt Clearance Type

Socket Shape

Finish

Phosphate Coated

Titanium Aluminum Nitride (TiAlN) Coated

Titanium Nitride (TiN) Coated

Zinc Flake Coated

Socket Type

Fastener-Holding Mechanism

Spring-Loaded Ball

Material

Aluminum Bronze

Beryllium Copper

Stainless Steel

Hex Shank Size

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REACH

DFARS Specialty Metals

RoHS

Export Control Classification Number (ECCN)

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How can we improve?

459 Products

Fastening and Joining

Nut Starters

Begin turning nuts in hard-to-reach spots

Screwdriver Bits

Screwdriver Bits

Pair with drivers to turn screws

Nutdriver Bits

Pair with nutdrivers to turn hex nuts and cap screws

Screwdrivers

Tighten and loosen screws

L-Keys

Turn fasteners from either end and reach into tight spots

Nutdrivers

Tighten and loosen nuts and bolts

T-Handle Keys

To turn fasteners in hard-to-reach spots, there's a long shaft and a grip for your whole hand

Driver Shafts

Attach to a handle to create your own driver tool, or pair with socket wrenches and power tools

Screwdriver/Nutdrivers

Screwdriver/Nutdrivers

Quickly switch between driving screws and driving nuts

Bit Sockets

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

Ratchet Wrenches

Ratchet Wrenches

Adjust fasteners in tight spaces without removing and repositioning the wrench

Sockets

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

Wrench Heads

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

Socket Bits

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

Box Wrenches

Grip all sides of a fastener to prevent slipping

Combination Wrenches

Combination Wrenches

Use the open end when tightening in cramped spaces and the box end when you need extra grip

Open-End Wrenches

Open-End Wrenches

Tighten and loosen fasteners from the top or the side

Socket Wrenches

Socket Wrenches

Apply torque to turn nuts, bolts, and other fasteners without rounding the heads

Torque Wrenches

Torque Wrenches

Avoid overtightening and damaging fasteners by applying a specific torque

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