1/4"-20 Helicoils | McMaster-Carr

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System of Measurement

Helical Insert Type

Material

Installed Length

Thread Direction

For Tap Type

Number of Inserts Included

Thread Type

UNC

For Insert Thread Size

Drill Bit Size

Military Specification

For Use On

Thread Spacing

Specifications Met

Tensile Strength

DFARS Specialty Metals

Passivation

Finish

RoHS

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

Export Control Classification Number (ECCN)

Chamfer Type

Length

Maximum Tapping Depth

1 1/8"

Number of Flutes

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65 Products

Fastening and Joining

Threaded Inserts

Create new threads or repair stripped threads

48 products

Threaded Insert Installation Tools

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

9 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

3 products

Measuring and Inspecting

Plug Gauges

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

2 products