4-40 Helicoils | McMaster-Carr

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System of Measurement

Helical Insert Style

Material

Installed Length

Specifications Met

Thread Type

For Tap Type

Thread Direction

For Insert Thread Size

4-40

Military Specification

Passivation

Drill Bit Size

Finish

Number of Inserts Included

288

DFARS Specialty Metals

RoHS

Compliant with Exemptions

REACH

Chamfer Type

Export Control Classification Number (ECCN)

Tensile Strength

For Use On

Thread Spacing

For Insert Thread Type

UNC

Length

Pitch Diameter Limit

Forward

How can we improve?

59 Products

Fastening and Joining

Threaded Inserts

Create new threads or repair stripped threads

47 products

Threaded Insert Installation Tools

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

5 products

Threaded Insert Removal Tools

Turn counterclockwise to extract helical inserts

3 products

Fabricating and Machining

Taps

Cut internal threads for fasteners, pipe, conduit, and more

2 products

Measuring and Inspecting

Plug Gauges

Verify the diameter or threads of machined holes in finished parts; also called pin gauges

2 products