1/4"-20 Helicoils | McMaster-Carr

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System of Measurement

Helical Insert Style

Material

Installed Length

Thread Direction

Number of Inserts Included

For Insert Thread Size

1/4"-20

For Tap Type

Helical

Thread Type

UNC

Military Specification

Drill Bit Size

For Use On

Specifications Met

Passivation

Thread Spacing

DFARS Specialty Metals

Length

RoHS

Compliant with Exemptions

Tensile Strength

REACH

Finish

Export Control Classification Number (ECCN)

EAR99

Chamfer Type

Bottoming

Plug

For Insert Thread Type

UNC

Maximum Tapping Depth

1 1/8"

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62 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

6 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