M12 Nuts | McMaster-Carr

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System of Measurement

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Thread Pitch

Nut Type

Material

Hex Nut Profile

Fastener Strength Grade/Class

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Finish

Corrosion-Resistant Coated

Dyed

Galvanized

Hot-Dipped Galvanized

Zinc Yellow-Chromate Plated

Width

Thread Spacing

Thread Type

Metric Rounded Trapezoidal

Thread Direction

Specifications Met

Fastener Strength Rating

Locking Type

Performance

Thread Fit

Metric Interference Sk6

Metric Trapezoidal Class 7e

Metric Trapezoidal Class 7H

Metric Trapezoidal Class 8e

Unified Standard Class 2A

Unified Standard Class 2B

Length

Drive Style

REACH

RoHS

Compliant with Exemptions

Not Compliant

DFARS Specialty Metals

Compliant

Exempt

Not Compliant

Export Control Classification Number (ECCN)

1C998

EAR99

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Color

1,077 Products

Fastening and Joining

Hex Nuts

Handle most general fastening needs

103 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

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

122 products

Rivet Nuts

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

12 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

Hex Head Screws

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

10 products

Thumb Screws

Tighten and loosen by hand without the need for tools

2 products

Standoffs

Separate, position, or connect 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

Bearing Nuts

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

11 products

Lead Screws and Nuts

Move components in a straight line in clamping and heavy duty lifting and lowering applications

6 products

Precision Lead Screws and Nuts

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

11 products

Lead Screw Collars

Position components and limit travel along a lead screw

1 product

Ball Screws and Nuts

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

6 products

End Supports for Ball Screws and Precision Lead Screws

Brace and secure the ends of ball screws and precision lead screws

1 product

Fabricating and Machining

T-Slot Nuts

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

15 products

Setup Studs

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

50 products

T-Slot Bolts

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

21 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

Tap Collet Holders

Hold tap collets on CNC machines

4 products

Building and Machinery Hardware

Strut Channel Nuts

Fasten on threaded rod to connect components to strut channel

9 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

Electrical Power, Networking, and Controlling

Conduit Locknuts

Secure threaded conduit fittings to knockouts in outlet boxes or enclosures

4 products

Material Handling

Eye Nuts

Pair with bolts or threaded rod to lift and hang components

6 products