Metric Keys | McMaster-Carr

Filter by

System of Measurement

Unit of Measure

Width

Length

Height

Key Type

Material

Beryllium Copper

Stainless Steel

Tolerance Rating

Specifications Met

Fed. Spec. GGG-W-001405

Minimum Hardness

DFARS Specialty Metals

REACH

RoHS

Compliant with Exemptions

Export Control Classification Number (ECCN)

For Keyway Diameter

Drive Size

Drive Style

Drilled Spanner

External 12-Point

External Square

Hex with Pilot Recess

Tamper-Resistant Hex

Tamper-Resistant Torx

Tip Style

Finish

Chromate Conversion Coated

Magnesium Phosphate Coated

Phosphate Coated

Titanium Aluminum Nitride (TiAlN) Coated

Titanium Nitride (TiN) Coated

Zinc Yellow-Chromate Plated

Sold As

Thread Size

Driver Style

Overall Length

15/16" to 1 1/8"

1 1/4" to 1 3/8"

1 5/16" to 4 3/4"

1 5/16" to 6 13/16"

Number of Pieces

Shape

Stepped Rectangle

Square Drive Size

How can we improve?

2,237 Products

Fastening and Joining

Machine Keys

Transmit torque from rotating shafts to gears, sprockets, and other machine parts

Machine Key Stock

Machine Key Stock

Cut a custom length to transfer torque from shafts to components such as gears and sprockets

L-Keys

Turn fasteners from either end and reach into tight spots

T-Handle Keys

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

Screwdriver Bits

Screwdriver Bits

Pair with drivers to turn screws

Impact Drivers

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

Screwdrivers

Tighten and loosen screws

Driver Shafts

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

Nutdrivers

Tighten and loosen nuts and bolts

Bit Sockets

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

Box Wrenches

Grip all sides of a fastener to prevent slipping

Wrench Heads

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

Sockets

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

Socket Bits

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

Fabricating and Machining

Fixture Keys

Locate fixtures and vises on your machine table

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