Metric Allen Keys | McMaster-Carr

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System of Measurement

Unit of Measure

Drive Size

Tip Style

Drive Style

Drilled Spanner

External 12-Point

External Square

Hex with Pilot Recess

Tamper-Resistant Hex

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Driver Style

Finish

Magnesium Phosphate Coated

Phosphate Coated

Titanium Aluminum Nitride (TiAlN) Coated

Titanium Nitride (TiN) Coated

Zinc Phosphate Coated

Overall Length

15/16" to 1 1/8"

1 1/4" to 4 11/16"

1 5/16" to 4 11/16"

1 5/16" to 4 3/4"

1 5/16" to 6 13/16"

Material

Aluminum Bronze

Beryllium Copper

Stainless Steel

Color

Long Leg Length

Ball Location

Number of Pieces

Length

15/16" to 1 1/8"

1 1/4" to 4 11/16"

1 5/16" to 4 11/16"

1 5/16" to 4 3/4"

1 5/16" to 6 13/16"

Relative Length

Short Leg Length

Container Type

Metal Clip Rail

Metal Wall-Mount Case

Plastic Clip Rail

Plastic Roll-Up Pouch

Grip Style

Performance

Changeable Shaft

Corrosion Resistant

Drop Prevention

Electrically Insulating

Precise Control

Square Drive Size

REACH

RoHS

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

DFARS Specialty Metals

Export Control Classification Number (ECCN)

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1,704 Products

L-Keys

Easy-Align Ball-Tip L-Keys

Easy-Align Ball-Tip L-Keys

Turn screws at an angle when you can't access them head on

L-Keys

Precision manufactured L-keys for tightening and loosening screws

Easy-Align Ball-Tip L-Key Sets

Easy-Align Ball-Tip L-Key Sets

Reach corners and tight spaces with the sizes you use most

L-Key Sets

Keep a selection of top-quality L-keys on hand, so you always have the size you need

Stubby Easy-Align Ball-Tip L-Keys

Stubby Easy-Align Ball-Tip L-Keys

An extra-short leg squeezes into spots with low overhead clearance

Color-Coded Easy-Align Ball-Tip L-Key Sets

Color-Coded Easy-Align Ball-Tip L-Key Sets

Take the guesswork out of picking the right drive size

Stubby Easy-Align Ball-Tip L-Key Sets

Stubby Easy-Align Ball-Tip L-Key Sets

An extra-short leg squeezes into spots with low overhead clearance

Nonmagnetic L-Keys

Nonmagnetic L-Keys

Won't damage electronic equipment or attract loose metal parts and shavings

Screw-Holding Easy-Align Ball-Tip L-Key Sets

Screw-Holding Easy-Align Ball-Tip L-Key Sets

Grip a variety of screws to start and remove them in hard-to-reach places

Wall-Mount L-Key Sets

Wall-Mount L-Key Sets

Mount at your workstation so your L-keys are always in reach

Fold-Up L-Key Sets

Fold-Up L-Key Sets

Tuck into the handle like a Swiss army knife for easy carrying

Quick-Change Fold-Up L-Key Sets

Quick-Change Fold-Up L-Key Sets

Select the key you need without unstacking the others from the handle

Easy-Align Ball-Tip Fold-Up L-Key Sets

Easy-Align Ball-Tip Fold-Up L-Key Sets

Turn screws at an angle and tuck away like a Swiss army knife for easy carrying

Screw-Holding Easy-Align Ball-Tip L-Keys

Screw-Holding Easy-Align Ball-Tip L-Keys

Grip screws to start and remove them in hard-to-reach places

Electrically-Insulating L-Keys

Electrically-Insulating L-Keys

Prevent a dangerous zap if you accidentally touch a live circuit

Electrically Insulating L-Key Sets

Electrically Insulating L-Key Sets

Reach screws of various sizes when working near live electrical circuits

Nonsparking L-Key Sets

Nonsparking L-Key Sets

Won't create sparks when scraped, struck, or dropped

Tight-Clearance Pivoting L-Key Sets

Tight-Clearance Pivoting L-Key Sets

Fasten in cramped, obstructed spaces without ever lifting the tool off the fastener

Wall-Mount Easy-Align Ball-Tip L-Key Sets

Wall-Mount Easy-Align Ball-Tip L-Key Sets

Store L-keys that work in corners and tight spaces within reach

Other Products

T-Handle Keys

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

Screwdrivers

Tighten and loosen screws

Bit Sockets

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

Socket Bits

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

Screwdriver Bits

Screwdriver Bits

Pair with drivers to turn screws

Torque Screwdrivers

Torque Screwdrivers

Apply precise torque as you fasten screws to prevent overtightening

Sockets

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

Socket Organizers

Socket Organizers

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

Bit Adapters

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

L-Key Handles

Comfort with every turn—these upgrade your L-keys into T-handle keys

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