M3 Couplings | McMaster-Carr

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System of Measurement

Thread Size

Length

Material

Stainless Steel

Hex Size

Gender

Thread Length

Shape

Threading

Partially Threaded

Thread Pitch

Hex Length

OD

Thread Type

Metric Rounded Trapezoidal

Finish

Thread Fit

Metric Class 6g

Metric Class 6H

Unified Standard Class 2A

Unified Standard Class 2B

RoHS

Compliant with Exemptions

REACH

Export Control Classification Number (ECCN)

DFARS Specialty Metals

Nut Type

Externally Threaded

Tensile Strength

10,000 psi to 19,999 psi

40,000 psi to 99,999 psi

100,000 psi or greater

Hardness

Specifications Met

Pitch

Width

Drive Style

How can we improve?

745 Products

Fastening and Joining

Standoffs

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

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Coupling Nuts

Connect and extend threaded rods

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 Screw Nuts

Lead Screw Nuts

Mate with lead screws to move components in a straight line

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.)