Locking Fasteners | McMaster-Carr

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11,007 Products

Most Likely Products

Locknuts

Hold fasteners in place to prevent loosening from vibration

1,602 products

Bearing Locknuts

Hold bearings, bushings, pulleys, and gears in place on threaded shafts and spindles

163 products

Quick-Release Pins

Fasten or remove components on equipment with a spring-loaded retaining ball

921 products

Socket Head Screws

With a deeper drive than flat and rounded head screws, these withstand more torque for a tighter hold

565 products

Clevis Pins

Secure parts in place and lock with a cotter pin or retaining ring

2,039 products

Fastener Assortments

Keep a variety of common screws, nuts, and washers on hand

7 products

Rounded Head Screws

Sit just above the surface for a low-profile finish and hold tighter than flat head screws

826 products

Flange Nuts

The flange distributes pressure, so you don't need a washer

399 products

Lock Washers

Resist vibration to prevent fasteners from loosening

1,623 products

All Results

Fastening and Joining

Locknuts

Hold fasteners in place to prevent loosening from vibration

1,602 products

Flange Nuts

The flange distributes pressure, so you don't need a washer

399 products

Cap Nuts

Cover and protect threads while adding a finished look; also known as acorn nuts

79 products

Thumb Nuts

Easy to tighten and loosen by hand for making frequent adjustments

8 products

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

4 products

Socket Head Screws

With a deeper drive than flat and rounded head screws, these withstand more torque for a tighter hold

565 products

Fastener Assortments

Keep a variety of common screws, nuts, and washers on hand

7 products

Rounded Head Screws

Sit just above the surface for a low-profile finish and hold tighter than flat head screws

826 products

Hex Head Screws

Used with nuts to create a stronger joint than flat and rounded screws

245 products

Shoulder Screws

Rotate parts around the cylinder under the head to guide and align them during installation

552 products

Set Screws

Exert pressure at the tip to hold parts in place, unlike screws that hold material together with threads

336 products

Flat Head Screws

Fit in countersunk holes for a flush finish that won't snag on surrounding parts

162 products

Tapping Screws

Fasten a range of materials together without needing to tap the hole first

1 product

Quick-Release Pins

Fasten or remove components on equipment with a spring-loaded retaining ball

921 products

Clevis Pins

Secure parts in place and lock with a cotter pin or retaining ring

2,039 products

Lock Washers

Resist vibration to prevent fasteners from loosening

1,623 products

Threaded Inserts

Create new threads or repair stripped threads

959 products

Press-Fit Nuts

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

32 products

Weld Nuts

Weld to metal surfaces to add permanent threads

22 products

Binding Barrel Posts and Screws

Thread together for a low-profile fastener

20 products

Rivets

Join materials together permanently, especially when too thin or fragile to fasten with screws

4 products

Standoffs

Separate, position, or connect components in assemblies

69 products

Threaded Insert Installation Tools

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

239 products

Rivet Tools

Install and remove blind, solid, hollow, and other types of rivets

4 products

Power Transmission

Bearing Locknuts

Hold bearings, bushings, pulleys, and gears in place on threaded shafts and spindles

163 products

Bearing Lock Washers

Lock bearing nuts in place to prevent loosening due to vibration

103 products

Material Handling

Hoist Rings

Pivot to resist stress that would bend or break an eyebolt when lifting at an angle

16 products

Bungee Cord Locks

Position on bungee cords to create stops and keep the cords from rubbing against surfaces

7 products

U-Bolts

Anchor heavy pipe, tube, and conduit; stronger than routing clamps and hangers

137 products

Building and Machinery Hardware

Knobs

Position, tighten, and secure fixtures and equipment

12 products

Fabricating and Machining

Spring Clamps

Hold lightweight materials in place, then squeeze to release

3 products