UNF Inserts | McMaster-Carr

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System of Measurement

Thread Size

Threaded Insert Type

Material

Installed Length

For Use In

End Type

Thread Insert Style

Thread Type

UN/UNF (SAE Straight)

Thread Spacing

Drill Bit Size

Thread Direction

Helical Insert Style

REACH

For Use On

Thread Fit

Unified Standard Class 1B

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Unified Standard Class 3B

Tensile Strength

Less than 20,000 psi

20,000 psi to 39,999 psi

40,000 psi to 49,999 psi

50,000 psi to 99,999 psi

100,000 psi or greater

Specifications Met

Nut Type

Export Control Classification Number (ECCN)

2B998

EAR99

RoHS

Compliant

Compliant with Exemptions

Not Compliant

DFARS Specialty Metals

Compliant

Exempt

Not Compliant

Number of Inserts Included

235

Military Specification

Thread Length

1,458 Products

Fastening and Joining

Threaded Inserts

Create new threads or repair stripped threads

486 products

Press-Fit Nuts

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

49 products

Rivet Nuts

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

57 products

Screw-Mount Nuts

Mount with screws, rivets, and nails to add threads to a surface

1 product

Weld Nuts

Weld to metal surfaces to add permanent threads

200 products

Adhesive-Mount Nuts

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

22 products

Snap-In Nuts

Push into square holes in thin materials to add bolts for aligning off-center parts

10 products

Socket Nuts

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

15 products

Standoff Caps

Create a finished look on standoffs and protect them from dirt and debris

4 products

Studs

Press, weld, or screw in place to add a threaded fastening point

54 products

Single-End Studs

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

47 products

Binding Barrels and Screws

Thread together for a low-profile fastener

10 products

Threaded Insert Tools

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

29 products

Fabricating and Machining

Lathe Tool Inserts

Pair with lathes to add cuts and grooves to workpieces

10 products

Lathe Tools

Shape workpieces as they rotate on a lathe

86 products

Building and Machinery Hardware

Leveling Mounts

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

160 products

Vibration-Damping Mounts

Attach to machinery to reduce vibration and noise and extend service life

15 products

Protective Plugs

Insert into holes in pipe, containers, panels, and parts to keep out debris

28 products

Protective Caps

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

17 products