1/4"-28 Inserts | McMaster-Carr

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Threaded Insert Type

Material

For Tap Thread Size

Installed Length

For Use In

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Helical Insert Style

For Tap Type

Military Specification

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Specifications Met

Thread Spacing

Key-Locking Insert Wall Style

Thread Insert Style

Drill Bit Size

Number of Locking Keys

Nut Type

For Material Thickness

0.027" to 0.165"

0.03" to 0.09"

0.165" to 0.26"

DFARS Specialty Metals

Compliant

Exempt

Not Compliant

Export Control Classification Number (ECCN)

EAR99

RoHS

Compliant

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

Thread Fit

Unified Standard Class 1B

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Unified Standard Class 3B

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247 Products

Fastening and Joining

Threaded Inserts

Create new threads or repair stripped threads

74 products

Rivet Nuts

Add threads to thin panels with access from only one side; also known as blind inserts

7 products

Press-Fit Nuts

Push into drilled or punched holes to add threads to thin panels

7 products

Rivet-Mount Nuts

Add threads in hard-to-reach areas and materials that are too thin to be tapped

8 products

Weld Nuts

Weld to metal surfaces to add permanent threads

12 products

Adhesive-Mount Nuts

Attach threads to material that’s too thin for a threaded insert

8 products

Socket Nuts

Install in recessed holes and tight spots where a wrench won’t fit; also known as Allen nuts

2 products

Single-End Studs

Use the unthreaded end as a pivot point, hinge, shaft, or locator pin

11 products

Threaded Insert Installation Tools

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

14 products

Threaded Insert Removal Tools

Turn counterclockwise to extract helical inserts

Prong Break-Off Tools for Threaded Inserts

The spring-loaded punch breaks the prong off installed inserts

1 product

Building and Machinery Hardware

Leveling Mounts

Level machines and workbenches on uneven surfaces, reduce vibration, and protect floors

12 products

Protective Caps

Protect just about anything, including pipe, flanges, screws, and posts

2 products

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

17 products