UNF Inserts | McMaster-Carr

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System of Measurement

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Threaded Insert Type

Material

Installed Length

For Use In

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Thread Insert Style

Thread Type

UN/UNF (SAE Straight)

For Tap Thread Size

Thread Spacing

Drill Bit Size

Helical Insert Style

Thread Direction

Nut Type

REACH

For Use On

For Material Thickness

DFARS Specialty Metals

Compliant

Exempt

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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

Not Rated

RoHS

Compliant

Compliant with Exemptions

Not Compliant

Export Control Classification Number (ECCN)

Specifications Met

Hole Diameter

Military Specification

1,518 Products

Fastening and Joining

Threaded Inserts

Create new threads or repair stripped threads

504 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

55 products

Weld Nuts

Weld to metal surfaces to add permanent threads

200 products

Screw-Mount Nuts

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

1 product

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 Installation Tools

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

29 products

Fabricating and Machining

Taps

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

45 products

Lathe Tool Inserts

Pair with lathes to add cuts and grooves to workpieces

20 products

Lathe Tools

Shape workpieces as they rotate on a lathe

90 products

Fixture Clamps

Secure your workpiece to a fixture table so it won't move during machining

4 products

Building and Machinery Hardware

Protective Caps

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

17 products

Protective Plugs

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

28 products

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

18 products