1/4"-20 Inserts | McMaster-Carr

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System of Measurement

Thread Size

Threaded Insert Type

Material

Stainless Steel

For Use In

Installed Length

Less than 0.25"

0.25" to 0.499"

10 mm to 19.9 mm

End Type

Thread Insert Style

For Tap Thread Size

Drill Bit Size

Thread Type

Thread Spacing

Nut Type

Body Length

For Tap Type

Thread Fit

Metric Class 6H

Unified Standard Class 1A

Unified Standard Class 1B

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Unified Standard Class 3B

Thread Direction

Finish

Neoprene Coated

Phosphate Coated

Tin Zinc Plated

Zinc Yellow-Chromate Plated

DFARS Specialty Metals

For Material Thickness

0.01" to 0.165"

0.015" to 0.094"

0.015" to 0.643"

0.016" to 0.188"

0.020" to 0.079"

0.020" to 0.085"

0.020" to 0.118"

0.020" to 0.280"

0.02" to 0.165"

0.027" to 0.15"

0.027" to 0.165"

0.031" to 0.187"

0.039" to 0.138"

0.060" to 0.138"

Drive Style

Tamper-Resistant Torx

REACH

Thread Pitch

RoHS

Compliant with Exemptions

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

Export Control Classification Number (ECCN)

How can we improve?

1,459 Products

Fastening and Joining

Threaded Inserts

Threaded Inserts

Create new threads or repair stripped threads

Rivet Nuts

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

Press-Fit Nuts

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

Screw-Mount Nuts

Screw-Mount Nuts

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

Weld Nuts

Weld to metal surfaces to add permanent threads

Tube-Connecting Nuts

Tube-Connecting Nuts

Push inside tubes to join them with a threaded stud instead of welding

Adhesive-Mount Nuts

Adhesive-Mount Nuts

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

Dowel Nuts

Form joints in blind holes in wood

Snap-In Nuts

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

Studs

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

Joint Clamps for Wood

Joint Clamps for Wood

Make secure joints between boards, butcher blocks, and countertops

Binding Barrels

Binding Barrels

Create custom low-profile fasteners with binding barrel posts, caps, and screws

Anchors

Secure anything from signs to heavy machinery in concrete, brick, and drywall

Single-End Studs

Single-End Studs

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

Socket Nuts

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

Standoff Caps

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

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

Rivet Nut Tools

Rivet Nut Tools

Install rivet nuts

Anchor Installation Tools

Anchor Installation Tools

Drive with a hammer to expand and secure anchors in place

Fabricating and Machining

Taps

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

T-Slot Nuts

Combine with setup studs or bolts to mount fixtures to machine tables

Fixture Clamps

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

Fixture Plate Plugs

Fixture Plate Plugs

Keep chips and shavings from clogging or damaging unused holes on fixture plates in milling machines

Building and Machinery Hardware

Leveling Mount Inserts

Leveling Mount Inserts

Slip onto equipment and furniture to add threaded-stud leveling feet

Leveling Mounts

Leveling Mounts

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

Vibration-Damping Mounts

Vibration-Damping Mounts

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

Protective Feet

Protective Feet

Add to furniture and light equipment to protect floors from scratches and wear

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

Strut Channel Nuts

Strut Channel Nuts

Fasten on threaded rod to connect components to strut channel

T-Slotted Framing and Fittings

T-Slotted Framing and Fittings

The most versatile system, attach fittings along the continuous slots to build virtually anything

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