M4 Nuts | McMaster-Carr

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Corrosion-Resistant Coated

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1,268 Products

Fastening and Joining

Hex Nuts

Handle most general fastening needs

48 products

Locknuts

Hold fasteners in place to prevent loosening from vibration

23 products

Flange Nuts

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

11 products

Cap Nuts

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

7 products

Square Nuts

Flat sides won’t spin in channels and square holes

7 products

Thumb Nuts

Easy to tighten and loosen by hand for making frequent adjustments

17 products

Coupling Nuts

Connect and extend threaded rods

12 products

Slotted Round Nuts

Fasten with a screwdriver in tight spots where there's no room for a wrench

1 product

Socket Nuts

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

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

37 products

Rivet Nuts

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

30 products

Threaded Inserts

Create new threads or repair stripped threads

149 products

Weld Nuts

Weld to metal surfaces to add permanent threads

15 products

Clip-On Nuts

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

3 products

Adhesive-Mount Nuts

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

12 products

Binding Barrels

Create custom low-profile fasteners with binding barrel posts, caps, and screws

24 products

Thread Adapters

Join threads of a different type, size, and gender

252 products

Standoffs

Separate, position, or connect components in assemblies

391 products

Thumb Screws

Tighten and loosen by hand without the need for tools

12 products

Studs

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

20 products

Press-Fit Nut Installation Tools

Everything you need to install press-fit nuts by hand

Building and Machinery Hardware

T-Slotted Framing Fasteners

Secure brackets and other accessories to T-slotted rails

21 products

Fabricating and Machining

T-Slot Nuts

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

2 products

Fixture Clamps

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

6 products

Setup Studs

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

4 products

Power Transmission

Precision Lead Screws and Nuts

Pair with a motor for accurate starts and stops in automated motion and positioning applications

29 products

Lead Screw Collars

Position components and limit travel along a lead screw

1 product

Ball Screw Nuts

Internal ball bearings roll on ball screws for low friction when moving components

1 product