4-40 Helicoils | McMaster-Carr

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System of Measurement

Helical Insert Type

Material

Installed Length

Specifications Met

Thread Type

For Tap Type

Thread Direction

Military Specification

Passivation

DFARS Specialty Metals

Drill Bit Size

For Insert Thread Size

For Use On

Number of Inserts Included

Finish

Chamfer Type

RoHS

REACH

Thread Spacing

Export Control Classification Number (ECCN)

Tensile Strength

For Insert Thread Type

UNC

Pitch Diameter Limit

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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