5/8"-18 Inserts | McMaster-Carr

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Key-Locking Insert Wall Type

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Tensile Strength

50,000 psi to 99,999 psi

100,000 psi or greater

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Unified Standard Class 2B

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

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Compliant with Exemptions

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Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

126 Products

Fastening and Joining

Threaded Inserts

Create new threads or repair stripped threads

46 products

Weld Nuts

Weld to metal surfaces to add permanent threads

26 products

Socket Nuts

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

1 product

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

2 products

Building and Machinery Hardware

Protective Plugs

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

6 products

Protective Caps

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

6 products

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

15 products

Leveling Mounts

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

19 products

Fabricating and Machining

Taps

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

3 products