M3 Nuts | McMaster-Carr

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863 Products

Fastening and Joining

Hex Nuts

Handle most general fastening needs

Locknuts

Hold fasteners in place to prevent loosening from vibration

Flange Nuts

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

Square Nuts

Flat sides won’t spin in channels and square holes

Cap Nuts

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

Easy to tighten and loosen by hand for making frequent adjustments

Coupling Nuts

Connect and extend threaded rods

Sealing Nuts

Prevent leaks and block out contaminants with a rubber seal

Slotted Round Nuts

Slotted Round Nuts

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

Socket Nuts

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

Press-Fit Nuts

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

Weld Nuts

Weld to metal surfaces to add permanent threads

Rivet Nuts

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

Threaded Inserts

Threaded Inserts

Create new threads or repair stripped threads

Standoffs

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

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Tighten and loosen by hand without the need for tools

Push Nut Installation Tools

Push Nut Installation Tools

Press nuts and retaining rings onto threaded fasteners and shafts

Rivet Nut Tools

Rivet Nut Tools

Install rivet nuts

Building and Machinery Hardware

T-Slotted Framing and Fittings

T-Slotted Framing and Fittings

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

Power Transmission

Lead Screws and Nuts

Lead Screws and Nuts

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

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)