M3 Adapters | McMaster-Carr

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System of Measurement

Thread Size

Gender

Material

Hex Length

Hex Size

Length

Thread Length

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Thread Type

Pitch

Fitting Type

For Adapting

Pipe Size

Mounting Thread Size

REACH

Screw Size

RoHS

Compliant with Exemptions

Thread Pitch

DFARS Specialty Metals

Compliant

Exempt

Not Compliant

Export Control Classification Number (ECCN)

Drive Style

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

Thread Fit

Unified Standard Class 2A

Unified Standard Class 2B

Mounting Thread Gender

Finish

382 Products

Fastening and Joining

Thread Adapters

Join threads of a different type, size, and gender

166 products

Standoffs

Separate, position, or connect components in assemblies

124 products

Threaded Inserts

Create new threads or repair stripped threads

11 products

Weld Nuts

Weld to metal surfaces to add permanent threads

4 products

Fluid Handling

Pipe and Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases

14 products

Tube Fittings

Make threaded, push to connect, barbed, and other types of connections between lengths of tube

36 products

Manifolds

Distribute air or fluid to multiple places from a single source; also called headers

5 products

Measuring and Inspecting

Probe Stylus Accessories

Add components that extend length, adapt threads, or hold multiple styli at once

1 product

Building and Machinery Hardware

Positioning Arms

Mount and position tools and other small equipment

2 products

Electrical Power, Networking, and Controlling

RJ45 Adapters

Connect two Ethernet cords together

7 products

Power Transmission

Rod Ends

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

3 products

Torque Limiters

Keep torque at or below a set limit to control tension or braking or protect machinery from overload

3 products

Brakes

Control how much and how quickly your drive system slows down

1 product

U-Joints

Transfer torque between shafts at an angle; handle more torque and misalignment than flexible shafts

3 products