M12 Fasteners | McMaster-Carr

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System of Measurement

Thread Size

Length

Thread Pitch

Material

Threading

Threaded on Both Ends

Fastener Head Type

Fastener Strength Grade/Class

Finish

Corrosion-Resistant Coated

Dyed

Galvanized

Hot-Dipped Galvanized

Zinc Yellow-Chromate Plated

Thread Spacing

Thread Type

Metric Rounded Trapezoidal

Specifications Met

Thread Direction

Right Hand and Left Hand

Drive Style

Hex with Pilot Recess

Socket Head Profile

Head Height

Head Width

Tensile Strength

10,000 psi to 19,999 psi

20,000 psi to 29,999 psi

30,000 psi to 99,999 psi

100,000 psi or greater

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

Head Diameter

Drive Size

DFARS Specialty Metals

RoHS

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

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

Yes

Export Control Classification Number (ECCN)

2,774 Products

Fastening and Joining

Hex Head Screws

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

576 products

Socket Head Screws

With a deeper drive than flat and rounded head screws, these withstand more torque for a tighter hold

236 products

Set Screws

Exert pressure at the tip to hold parts in place, unlike screws that hold material together with threads

140 products

Flat Head Screws

Fit in countersunk holes for a flush finish that won't snag on surrounding parts

76 products

Rounded Head Screws

Sit just above the surface for a low-profile finish and hold tighter than flat head screws

58 products

12-Point Screws

12 contact points handle more torque than a hex head while a flange eliminates the need for a washer

5 products

Shoulder Screws

Rotate parts around the cylinder under the head to guide and align them during installation

201 products

Thumb Screws

Tighten and loosen by hand without the need for tools

8 products

Carriage Bolts

A smooth head provides a finished look while a square neck keeps the bolt in place when using a nut

17 products

Wood Screws

Fasten material to wood or pieces of wood to each other

15 products

Hex Nuts

Handle most general fastening needs

103 products

Flange Nuts

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

55 products

Locknuts

Hold fasteners in place to prevent loosening from vibration

47 products

Lug Nuts

Secure pneumatic wheels to axles

3 products

Coupling Nuts

Connect and extend threaded rods

15 products

Split Nuts

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

1 product

Cap Nuts

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

9 products

Panel Nuts

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

1 product

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

6 products

Thumb Nuts

Easy to tighten and loosen by hand for making frequent adjustments

11 products

Square Nuts

Flat sides won’t spin in channels and square holes

3 products

Socket Nuts

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

2 products

Threaded Rods

Anchor, connect, or hang components in a wide variety of applications

139 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

8 products

Weld Nuts

Weld to metal surfaces to add permanent threads

8 products

Adhesive-Mount Nuts

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

4 products

Press-Fit Nuts

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

6 products

Quick-Release Pins

Fasten or remove components on equipment with a spring-loaded retaining ball

7 products

Quick-Release Pin Receptacles

Secure quick-release pins when you don’t have a through hole

2 products

Taper Pins

Fit snugly into tapered holes to secure, position, and align components

24 products

Single-End Studs

Use the unthreaded end as a pivot point, hinge, shaft, or locator pin

4 products

Thread Adapters

Join threads of a different type, size, and gender

471 products

Standoffs

Separate, position, or connect components in assemblies

2 products

Magnets

Attract or repel metal objects to hang, secure, or position them

Threaded Insert Installation Tools

Install helical, key-locking, slotted-drive, and other threaded inserts

46 products

Power Transmission

Shock Absorber Mounting Nuts

Secure shock absorbers after threading them into mounting blocks

1 product

Rod Ends

Use with connecting rods to support loads and control steering, tensioning, or pivoting motion

56 products

Connecting Rods

Use with rod ends and swivel joints to link components in push/pull assemblies

32 products

Lead Screw Collars

Position components and limit travel along a lead screw

1 product

Precision Lead Screws and Nuts

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

11 products

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

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

Setup Studs

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

50 products

T-Slot Nuts

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

15 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

5 products

Lathe Chuck Jaw Nuts

Secure jaws to a CNC lathe chuck

2 products

Toggle Clamps

Lock workpieces onto worktables or objects

10 products

Building and Machinery Hardware

Knobs

Position, tighten, and secure fixtures and equipment

15 products

Cam Handles

For fast clamping, push down on the handle to draw two parts together

1 product

Handle Nuts

Attach to threaded shafts to quickly turn the shafts by hand

2 products

T-Slotted Framing and Fittings

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

6 products

Strut Channel Nuts

Fasten on threaded rod to connect components to strut channel

9 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

Eyebolts

Route rope through the loop or attach hooks and shackles for lifting

14 products

Hoist Rings

Pivot to resist stress that would bend or break an eyebolt when lifting at an angle

18 products

U-Bolts

Anchor heavy pipe, tube, and conduit; stronger than routing clamps and hangers

4 products

Electrical Power, Networking, and Controlling

Conduit Locknuts

Secure threaded conduit fittings to knockouts in outlet boxes or enclosures

4 products