Metric Keys | McMaster-Carr

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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

Hardness

DFARS Specialty Metals

For Keyway Diameter

REACH

RoHS

Compliant with Exemptions

Export Control Classification Number (ECCN)

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

Shape

Stepped Rectangle

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

How can we improve?

2,321 Products

Machine Keys

Rounded Machine Keys

Rounded Machine Keys

Fill oval keyways completely, reducing stress on the key and shaft

Machine Keys

Install in keyways to transmit torque from shafts to gears and other components

Woodruff Keys

The rounded shape makes them easy to remove during frequent disassembly

Tapped Rounded Machine Keys

Tapped Rounded Machine Keys

Thread a screw through the tapped hole to pop these keys out of a keyway

Tapered Gib Keys

Tapered Gib Keys

The tapered body wedges in to the keyway for a more secure fit than standard machine keys

Standard Key Stock Assortments

Standard Key Stock Assortments

Include various sizes of key stock that you can cut to your desired length

Undersized Machine Key Assortments

Undersized Machine Key Assortments

A looser fit than standard keys, so they're best for uneven keyways or frequent disassembly

Woodruff Key Assortments

Woodruff Key Assortments

Rock in their seat to relieve stress on the shaft caused by vibration or misalignment

Oversized Machine Key Assortments

Oversized Machine Key Assortments

Slightly larger than the size listed for a tight fit in worn keyways

Undersized Key Stock Assortments

Undersized Key Stock Assortments

A looser fit than standard keys and are best for inconsistent keyways

Oversized Key Stock Assortments

Oversized Key Stock Assortments

Slightly larger than standard key stock, so keys fit tightly in worn keyways

Other Products

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

Fixture Keys

Locate fixtures and vises on your machine table

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

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

Screwdrivers

Tighten and loosen screws

Impact Drivers

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

Torque Screwdrivers

Torque Screwdrivers

Apply precise torque as you fasten screws to prevent overtightening

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

Driver Shafts

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

Socket Bits

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

Torque Screwdriver Shafts

Torque Screwdriver Shafts

Pair with a handle to create a custom torque screwdriver

Nutdrivers

Tighten and loosen nuts and bolts

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