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

DFARS Specialty Metals

Passivation

Drill Bit Size

For Insert Thread Size

For Use On

Number of Inserts Included

Chamfer Type

Finish

RoHS

REACH

Export Control Classification Number (ECCN)

Thread Spacing

Tensile Strength

For Insert Thread Type

UNC

Certificate Type

Accuracy Certificate Traceable to NIST

Calibration Certificate Traceable to NIST

Material Certificate with Traceable Lot Number

Pitch Diameter Limit

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62 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

8 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