1/4"-28 Helicoils | McMaster-Carr

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System of Measurement

Helical Insert Type

Installed Length

0.25" to 0.499"

Thread Direction

Material

18-8 Stainless Steel

Military Specification

For Tap Type

Thread Type

Specifications Met

Number of Inserts Included

Thread Spacing

For Insert Thread Size

Drill Bit Size

Tensile Strength

DFARS Specialty Metals

REACH

RoHS

Export Control Classification Number (ECCN)

For Use On

Stainless Steel

Chamfer Type

Passivation

Finish

Profile

For Use With

Helical Inserts

Screw-Locking Helical Inserts

Handle Style

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39 Products

Fastening and Joining

Threaded Inserts

Threaded Inserts

Create new threads or repair stripped threads

Threaded Insert Installation Tools

Threaded Insert Installation Tools

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

Threaded Insert Removal Tools

Threaded Insert Removal Tools

Turn counterclockwise to extract helical inserts

Fabricating and Machining

Taps

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

Measuring and Inspecting

Plug Gauges

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

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)