1/4"-20 Nuts | McMaster-Carr

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Nut Type

Hex Nut Profile

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Cadmium Yellow-Chromate Plated

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Cap Nut Profile

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Export Control Classification Number (ECCN)

2,113 Products

Fastening and Joining

Hex Nuts

Handle most general fastening needs

111 products

Locknuts

Hold fasteners in place to prevent loosening from vibration

71 products

Flange Nuts

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

38 products

Cap Nuts

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

32 products

Thumb Nuts

Easy to tighten and loosen by hand for making frequent adjustments

52 products

Coupling Nuts

Connect and extend threaded rods

25 products

Square Nuts

Flat sides won’t spin in channels and square holes

10 products

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

12 products

Push-Button Nuts

Disengage the threads to quickly slide along threaded rods

3 products

Socket Nuts

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

2 products

Split Nuts

Swivel to attach at any point on a threaded rod for quick installation

2 products

Sealing Nuts

Prevent leaks and block out contaminants with a rubber seal

1 product

Press-Fit Nuts

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

27 products

Rivet Nuts

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

64 products

Threaded Inserts

Create new threads or repair stripped threads

256 products

Weld Nuts

Weld to metal surfaces to add permanent threads

64 products

Clip-On Nuts

Slide onto the edge of thin panels to create a fastening point

10 products

Screw-Mount Nuts

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

8 products

Dowel Nuts

Form joints in blind holes in wood

5 products

Adhesive-Mount Nuts

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

18 products

Tube-Connecting Nuts

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

12 products

Snap-In Nuts

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

12 products

Push Nuts

Press onto threads for a light duty hold that’s faster to install than typical nuts

4 products

Binding Barrels and Screws

Thread together for a low-profile fastener

162 products

Thread Adapters

Join threads of a different type, size, and gender

419 products

Thumb Screws

Tighten and loosen by hand without the need for tools

18 products

Joint Clamps for Wood

Make secure joints between boards, butcher blocks, and countertops

3 products

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

1 product

Studs

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

65 products

Standoffs

Threaded to separate or connect parts as well as position components in assemblies

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

1 product

Building and Machinery Hardware

T-Slotted Framing Fasteners

Secure brackets and other accessories to T-slotted rails

25 products

Strut Channel Framing and Fittings

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

38 products

Handle Nuts

Attach to threaded shafts to quickly turn the shafts by hand

2 products

Leveling Mount Inserts

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

7 products

Fabricating and Machining

T-Slot Nuts

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

8 products

Setup Studs

Secure setup clamps and fixtures to your machine table or assemble heavy machines

31 products

Fixture Clamps

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

4 products

Material Handling

Eye Nuts

Pair with bolts or threaded rod to lift and hang components

6 products

Turnbuckles

Twist the body or end fittings to adjust the length and tension of attached rope and chain

8 products

Electrical

Electrical Enclosure Fasteners

Mount components to your enclosure without worrying about leaks

1 product

Power Transmission

Lead Screws and Nuts

Components travel along a screw with broad, square threads to clamp and lift heavy loads

20 products