4-40 Inserts | McMaster-Carr

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Material

Threaded Insert Type

Installed Length

For Use In

End Type

Thread Insert Style

Thread Type

Drill Bit Size

Thread Spacing

For Tap Thread Size

System of Measurement

Body Length

Thread Direction

Flange Diameter

REACH

Thread Fit

Unified Standard Class 1B

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Unified Standard Class 3B

Helical Insert Style

Specifications Met

RoHS

Compliant with Exemptions

Not Compliant

DFARS Specialty Metals

Compliant

Exempt

Not Compliant

Export Control Classification Number (ECCN)

EAR99

For Material Thickness

0.03" to 0.09"

0.04"

Military Specification

Nut Type

Length

287 Products

Fastening and Joining

Threaded Inserts

Create new threads or repair stripped threads

124 products

Press-Fit Nuts

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

34 products

Rivet Nuts

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

6 products

Weld Nuts

Weld to metal surfaces to add permanent threads

6 products

Rivet-Mount Nuts

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

5 products

Adhesive-Mount Nuts

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

10 products

Standoff Caps

Create a finished look on standoffs and protect them from dirt and debris

4 products

Studs

Press, weld, or screw in place to add a threaded fastening point

17 products

Socket Nuts

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

2 products

Threaded Insert Installation Tools

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

10 products

Press-Fit Nut Installation Tools

Everything you need to install press-fit nuts by hand

Threaded Insert Removal Tools

Turn counterclockwise to extract helical inserts

2 products

Prong Break-Off Tools for Threaded Inserts

The spring-loaded punch breaks the prong off installed inserts

1 product

Building and Machinery Hardware

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

4 products

Vibration-Damping Mounts

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

2 products

Fabricating and Machining

Fixture Clamps

Secure your workpiece to a fixture table so it won't move during machining

8 products

Fluid Handling

Bore Sealing Plugs

Permanently seal unthreaded holes in pneumatic and hydraulic components

2 products