M12 Nuts | McMaster-Carr

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Hex Nut Profile

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Corrosion-Resistant Coated

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Hot-Dipped Galvanized

Zinc Yellow-Chromate Plated

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Metric Rounded Trapezoidal

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Metric Interference Sk6

Metric Trapezoidal Class 7e

Metric Trapezoidal Class 7H

Metric Trapezoidal Class 8e

Unified Standard Class 2A

Unified Standard Class 2B

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Compliant with Exemptions

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REACH

Compliant

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For Ribbed Rivet Nut Thread Size

DFARS Specialty Metals

Compliant

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Export Control Classification Number (ECCN)

1,075 Products

Fastening and Joining

Hex Nuts

Handle most general fastening needs

99 products

Locknuts

Hold fasteners in place to prevent loosening from vibration

47 products

Flange Nuts

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

55 products

Panel Nuts

Extremely thin for tight spots such as electrical panels; also known as dress nuts

1 product

Coupling Nuts

Connect and extend threaded rods

15 products

Cap Nuts

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

9 products

Thumb Nuts

Easy to tighten and loosen by hand for making frequent adjustments

11 products

Lug Nuts

Secure pneumatic wheels to axles

3 products

Square Nuts

Flat sides won’t spin in channels and square holes

3 products

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

6 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

1 product

Weld Nuts

Weld to metal surfaces to add permanent threads

8 products

Rivet Nuts

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

8 products

Press-Fit Nuts

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

6 products

Threaded Inserts

Create new threads or repair stripped threads

96 products

Adhesive-Mount Nuts

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

4 products

Thread Adapters

Join threads of a different type, size, and gender

471 products

Thumb Screws

Tighten and loosen by hand without the need for tools

2 products

Standoffs

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

2 products

Sockets

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

Power Transmission

Shock Absorber Mounting Nuts

Secure shock absorbers after threading them into mounting blocks

1 product

Lead Screws and Nuts

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

18 products

Bearing Nuts

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

11 products

Ball Screws and Nuts

Provide smooth travel where high speeds, accurate positioning, and repeatable movement are required

6 products

Lead and Ball Screw End Supports

Brace and secure the ends of lead screws and ball screws

1 product

Fabricating and Machining

T-Slot Nuts

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

12 products

T-Slot Bolts

Secure clamps and workpieces to machine tables with quicker setup than a T-slot nut and stud

7 products

Setup Studs

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

48 products

Fixture Kits

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

5 products

Fixture Clamps

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

3 products

Lathe Chuck Jaw Nuts

Secure jaws to a CNC lathe chuck

2 products

Building and Machinery Hardware

Strut Channel Framing and Fittings

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

10 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

4 products

Material Handling

Eye Nuts

Pair with bolts or threaded rod to lift and hang components

6 products

Electrical

Conduit Locknuts

Secure threaded conduit fittings to knockouts in electrical boxes

4 products