M3 Couplings | McMaster-Carr

Filter by

System of Measurement

Thread Size

Length

Material

Hex Size

Gender

Shape

Thread Length

Threading

Hex Length

Thread Pitch

OD

Thread Type

Nut Type

Finish

USMCA Qualifying

Thread Fit

REACH Compliance

RoHS Compliance

Tensile Strength

DFARS Compliance

Hardness

Width

How can we improve?

740 Products

Fastening and Joining

Coupling Nuts

Connect and extend threaded rods

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Standoffs

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

Fluid Handling

Tube Fittings

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

Pipe Nipples and Pipe

Pipe Nipples and Pipe

Generally thicker and more rigid than tubing for distributing liquids and gases through your facility

Pipe Fittings

Form threaded, barbed, flanged, and other types of connections between lengths of pipe

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

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

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