Inserts | McMaster-Carr

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Unified Standard Class 1A

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20,000 psi to 39,999 psi

40,000 psi to 49,999 psi

50,000 psi to 99,999 psi

100,000 psi or greater

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28,587 Products

Fastening and Joining

Threaded Inserts

Create new threads or repair stripped threads

3,055 products

Rivet Nuts

Add threads to thin panels with access from only one side; also known as blind inserts

501 products

Press-Fit Nuts

Push into drilled or punched holes to add threads to thin panels

455 products

Screw-Mount Nuts

Mount with screws, rivets, and nails to add threads to a surface

27 products

Weld Nuts

Weld to metal surfaces to add permanent threads

589 products

Snap-In Nuts

Push into square holes in thin materials to add bolts for aligning off-center parts

100 products

Adhesive-Mount Nuts

Attach threads to material that’s too thin for a threaded insert

162 products

Tube-Connecting Nuts

Push inside tubes to join them with a threaded stud instead of welding

21 products

Rivet-Mount Nuts

Add threads in hard-to-reach areas and materials that are too thin to be tapped

41 products

Dowel Nuts

Form joints in blind holes in wood

11 products

Unthreaded Inserts

Reinforce, align, and adjust joints as you tighten a fastener

69 products

Quick-Release Pin Receptacles

Secure quick-release pins when you don’t have a through hole

35 products

Quick-Release Pin Retaining Caps

Hold quick-release pins in holes that are oversized or out of round

23 products

Anchors

Secure anything from signs to heavy machinery in concrete, brick, and drywall

970 products

Studs

Press, weld, or screw in place to add a threaded fastening point

674 products

Joint Clamps for Wood

Make secure joints between boards, butcher blocks, and countertops

3 products

Wood Screws

Fasten material to wood or pieces of wood to each other

13 products

Socket Nuts

Install in recessed holes and tight spots where a wrench won’t fit; also known as Allen nuts

65 products

Binding Barrels and Screws

Thread together for a low-profile fastener

536 products

Single-End Studs

Use the unthreaded end as a pivot point, hinge, shaft, or locator pin

184 products

Standoff Caps

Create a finished look on standoffs and protect them from dirt and debris

66 products

Washers

Nearly every size and shape imaginable, from flat washers to clipped to curved

4,668 products

Shims

Align and space components on shafts, or level machinery, cabinets, and doors

3,873 products

Retaining Rings

Hold components on a shaft

25 products

Threaded Insert Tools

Install or extract helical, key-locking, slotted-drive, and other threaded inserts

430 products

Press-Fit Nut Installation Tools

Everything you need to install press-fit nuts by hand

2 products

Screwdriver Bits

Pair with drivers to turn screws

Yank out a nut stuck inside a socket or other recess

1 product

Socket Inserts

Slip into sockets to keep fasteners from falling out

3 products

Anchor Installation Tools

Drive with a hammer to expand and secure anchors in place

20 products

Snap-In Nut Tools

Compress the legs of snap-in nuts so they're easy to install and remove

3 products

Fabricating and Machining

Lathe Tool Inserts

Pair with lathes to add cuts and grooves to workpieces

614 products

Lathe Tool Insert Holders

Secure inserts within lathes to add cuts and grooves to workpieces

226 products

Lathe Tools

Shape workpieces as they rotate on a lathe

733 products

Taps

Cut internal threads for fasteners, pipe, conduit, and more

164 products

End Mill Inserts

Replace the cutting edge on your end mill insert holder instead of the entire tool

10 products

End Mill Insert Holders

Pair with inserts to create end mills that have a replaceable cutting edge

23 products

Face Mill Inserts

Pair with face milling insert holders to create custom face mills

18 products

Face Mill Insert Holders

Pair with face milling inserts to create custom face mills

6 products

Face Mills

Flatten and smooth the surface of wide workpieces in high-speed, high-volume applications

169 products

Fixture Plate Plugs

Keep chips and shavings from clogging or damaging unused holes on fixture plates in milling machines

1 product

T-Slot Nuts

Combine with setup studs or bolts to mount fixtures to machine tables

181 products

Fixture Kits

Everything needed to mount workpieces of different sizes to your machine table

48 products

Fixture Clamps

Secure your workpiece to a fixture table so it won't move during machining

318 products

Drill Bit Inserts

Pair with compatible drill bit bodies to precisely drill multiple holes

18 products

Drill Bits

Create holes in metal, wood, plastic, concrete, and more

28 products

Knurls

Pair with a knurling tool to add patterns to workpieces for a better grip

41 products

Countersinks

Cut a cone-shaped opening in a hole to install flat-head screws and rivets flush with the surface

17 products

Clamps

Hold workpieces securely in place

14 products

Building and Machinery Hardware

Protective Caps

Protect just about anything, including pipe, flanges, screws, and posts

1,045 products

Protective Plugs

Insert into holes in pipe, containers, panels, and parts to keep out debris

1,011 products

Leveling Mounts

Level machines and workbenches on uneven surfaces, reduce vibration, and protect floors

1,314 products

Leveling Mount Inserts

Slip onto equipment and furniture to add threaded-stud leveling feet

81 products

Vibration-Damping Mounts

Attach to machinery to reduce vibration and noise and extend service life

848 products

Protective Feet

Add to furniture and light equipment to protect floors from scratches and wear

160 products

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

1,263 products

Grommets

Protect wire, cable, and cords from holes with sharp or rough edges

876 products

Surface Guards

Protect walls and other flat surfaces from impact

9 products

T-Slotted Framing and Fittings

The most versatile system, attach fittings along the continuous slots to build virtually anything

277 products

Strut Channel Framing and Fittings

Secure fittings in the U-shaped channel to route conduit and pipe or build other structures

217 products

Locking-Slotted Framing and Fittings

Make platforms, bases, and other structures that stand up to more movement than T-slotted framing

3 products

Material Handling

Caster Sockets

Mount on the inside corners of channel and other framing to attach stem casters

19 products

Hitch Inserts

Fit into hitch receivers and secure with a hitch pin to create a connection for towing

22 products

Hitch Receivers

Use with hitch inserts and pins to create a complete hitch for towing

2 products

Hitch Balls

Mount to hitch inserts and use with hitch receivers and couplers to tow trailers

9 products

Hitch Pins

Secure hitch inserts to hitch receivers for towing

5 products

Forklift Hitch Receivers

Secure to forklift forks and slide in a hitch to adapt a forklift for towing

1 product

Kingpins

Bolt or weld to a semi-trailer to connect it to your tractor

6 products

Protective Shipping Box Inserts

Fit snugly around glass bottles to absorb shock better than bubble wrap and air pillows

3 products

Shipping Box Liners

Line cardboard boxes to keep the items inside at a consistent temperature

13 products

Conveyor Guide Mounting Rod Caps

Cover the ends of conveyor guide mounting rods for a finished look

7 products

Power Transmission

Rod End Inserts

Attach to rod ends to increase the amount of misalignment they can handle

29 products

Rod Ends

Use with connecting rods to support loads and control steering, tensioning, or pivoting motion

6 products

Fluid Handling

Hose and Hose Fittings

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

264 products

Tube and Tube Fittings

Typically more flexible than pipe for carrying liquids and gases in short runs around equipment

93 products

Bore Sealing Plugs

Permanently seal unthreaded holes in pneumatic and hydraulic components

73 products

Safety Equipment

Bump Cap Inserts

Tuck inside a baseball cap to protect your head from bumps and scrapes

4 products

Insoles

Slip into shoes to add padding or puncture protection

9 products

Body Warmers

Place inside gloves, slip into shoes, or stick to clothing to stay warm

4 products

Electrical

Capacitor Boots

Shield capacitors and wire connections to extend their service life and reduce accidental shocks

3 products

Data Port Plugs

Keep dust, debris, and moisture out of unused computer ports

3 products

Data Port Locks

Block USB or Ethernet ports from unauthorized use

9 products

Outlet Strips

Plug in multiple devices to power them from a single outlet

1 product

DIN Rail Caps

Guard the edges of DIN rail from damage and create a finished look

2 products

Electronics Rack Equipment Installation Supports

Create temporary ledges to support heavy equipment as you mount it to a rack

4 products

Containers, Storage, and Furniture

Pail Liners

Protect pails from harsh contents and then dispose for quick cleanup

13 products

Tank Liners

Protect tanks from harsh contents and then dispose for quick cleanup

15 products

Drum Liners

Protect drums from contents and then dispose for quick cleanup

29 products

Stacking Caps and Targets

Turn the ends of posts into stackable shelving and rack systems

6 products

Facility and Grounds Maintenance

Faucet Hole Covers

Close off unused faucet holes intended for soap dispensers and side sprayers

2 products

Rebar Caps

Brightly colored to alert workers to exposed rebar and pipe

4 products

Heating, Ventilation, and Air Conditioning

Air Conditioner Service Valve Caps

Seal off AC service valves to prevent refrigerant from leaking out

2 products

Communication

Tamper-Evident Seals

Secure hasps, latches, and other connections to visibly indicate tampering

2 products