4-40 Bushings | McMaster-Carr

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System of Measurement

Thread Size

Material

Stainless Steel

Length

Hex Size

Gender

Shape

Thread Length

Threaded Insert Type

OD

Threading

Partially Threaded

Nut Type

Installed Length

Less than 0.25"

0.25" to 0.499"

For Use In

Specifications Met

SAE AMS-QQ-S-763

Finish

Dry Film Lubricated

Phosphate Coated

Tin Zinc Plated

REACH

RoHS

Compliant with Exemptions

DFARS Specialty Metals

Export Control Classification Number (ECCN)

Thread Fit

Unified Standard Class 1B

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Unified Standard Class 3B

Hardness

Thread Type

End Type

Helical Insert Style

How can we improve?

1,001 Products

Fastening and Joining

Threaded Inserts

Threaded Inserts

Create new threads or repair stripped threads

Weld Nuts

Weld to metal surfaces to add permanent threads

Rivet Nuts

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

Adhesive-Mount Nuts

Adhesive-Mount Nuts

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

Rivet-Mount Nuts

Rivet-Mount Nuts

Add threads in hard-to-reach areas and materials that are too thin to be tapped

Standoffs

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

Socket Nuts

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

Building and Machinery Hardware

Adjustable Handles

Adjustable Handles

Lift and turn to easily position and tighten components; also called clamping handles

Vibration-Damping Mounts

Vibration-Damping Mounts

Attach to machinery to reduce vibration and noise and extend service life

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

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