Keys | McMaster-Carr

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9,146 Products

Most Likely Products

Machine Keys

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

1,014 products

Keys

Replace or cut new keys for padlocks, enclosures, cabinet doors, and locksets

503 products

Machine Key Stock

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

824 products

All Results

Fastening and Joining

Machine Keys

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

1,014 products

Machine Key Stock

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

824 products

Split Rings

Secure clevis pins, connect components, or add a pull handle; also known as key rings

67 products

L-Keys

Turn fasteners from either end and reach into tight spots

1,831 products

T-Handle Keys

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

444 products

Screwdrivers

Tighten and loosen screws

494 products

Screwdriver Bits

Pair with drivers to turn screws

500 products

Torque-Limiting Keys

Used to install carbide inserts in cutting tools, a handle limits the amount of torque generated

42 products

Impact Drivers

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

1 product

Driver Shafts

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

59 products

Torque Screwdrivers

Apply precise torque as you fasten screws to prevent overtightening

38 products

Nutdrivers

Tighten and loosen nuts and bolts

154 products

Screw Starters

Grip and start turning screws that are too small to hold or located in hard-to-reach spots

3 products

L-Key Handles

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

1 product

Driver Extension Adapters

Create a tool that’s as long as you need to reach deeply recessed fasteners

44 products

Bit Sockets

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

1,039 products

Shut-Off Valve Wrenches

Turn hard-to-reach valves on gas lines, faucets, toilets, and sinks

2 products

Pipe/Valve Wheel Wrenches

Grip and turn pipe with one end and loosen valve wheels with the other

1 product

Box Wrenches

Grip all sides of a fastener to prevent slipping

315 products

Wrench Heads

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

135 products

Tank Wrenches

Turn valve stems, regulator inlet nuts, and caps on welding tanks

5 products

Drain Wrenches

Install and remove drain traps and fittings, overflow outlets, and toilet inlet spuds

3 products

Valve Wheel Wrenches

Supply the leverage needed to turn hand wheels on large valves

25 products

Sockets

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

3 products

Socket Bits

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

37 products

Backup Wrenches

Pair with a head and handle to create a wrench that keeps nuts from turning as you tighten bolts

15 products

Tool Holder Coolant Tube Wrenches

Install or remove coolant tubes inside HSK holders

18 products

Building and Machinery Hardware

Keys

Replace or cut new keys for padlocks, enclosures, cabinet doors, and locksets

503 products

Key Holders

Group keys on a single ring for easy access

23 products

Key-Control Cabinets

Lock and keep track of keys in a central location

20 products

Keyhead Covers

Color-code your keys for easy identification

2 products

Key Racks

Store and quickly identify keys with color-coded and labeled tags

2 products

Key-Control Cases

Organize, transport, and store keys in portable zippered cases

2 products

Padlocks

Shackle objects together, such as a door and its frame, to prevent theft or unauthorized entry

1,433 products

Fabricating and Machining

Fixture Keys

Locate fixtures and vises on your machine table

39 products

Drill Chuck Keys

Open and close drill chuck jaws

51 products

Drill Chuck Key Holders

Avoid losing your chuck key by securing it to your drill's power cord

2 products

Drill Drifts

Separate Morse taper shank cutting tools from spindles and adapters

10 products

Lathe Tool Insert Holder Replacement Parts

Replace clamps, screws, shims, and other parts in lathe tool insert holders

9 products

Lathe Chuck Keys

A long T-handle gives leverage to open tight lathe chucks

21 products

Electrical Power, Networking, and Controlling

Key Switches

Turn a key to actuate circuits, preventing accidental start and limiting access

76 products

Safety Switches

Protect people by cutting power to machines when access doors open; also known as interlock switches

36 products

Key Actuators

Pair with a contact block to create a custom key switch

19 products

Containers, Storage, and Furniture

Hex Key Organizers

Store L-keys and T-handle keys according to size

14 products

Communication