9/16"-12 Bushings | McMaster-Carr

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111 Products

How to Install Key-Locking Inserts

Stainless Steel Helical Inserts

Stainless Steel Screw-Locking Helical Inserts

A distorted thread grips the screw to resist loosening.

Helical Inserts with Installation Tools

Inserts come with a through-hole tap and installation tool.

Black-Phosphate Steel Key-Locking Inserts

A black-phosphate finish provides mild corrosion resistance.

18-8 Stainless Steel Key-Locking Inserts

Made of 18-8 stainless steel, these inserts have good corrosion resistance.

Mil. Spec. 18-8 Stainless Steel Key-Locking Inserts

These inserts are made to stringent military specifications.

Mil. Spec. Alloy Steel Key-Locking Inserts

The strongest key-locking inserts we offer, these inserts are made to stringent military specifications.

High-Strength A286 Stainless
Steel Key-Locking Inserts

The strongest and most corrosion-resistant stainless steel key-locking inserts we offer. Made of A286 stainless steel, these inserts stand up to salt water, harsh chemicals, and even high temperatures.

Closed-End Key-Locking Inserts

Protect threads from debris and leaks—these inserts have a closed end as a barrier.

Key-Locking Inserts with Installation Tool

These inserts come with an installation tool. Drive the keys into the surrounding material for a more secure hold than thread-locking inserts.

Screw-Locking Key-Locking Inserts

Forming the strongest hold of any of our threaded inserts, these inserts have a distorted internal thread to lock screws into place and keys that drive into surrounding material to prevent slipping and rotating.

Key-Locking Insert Assortments
with Installation Tool

Steel Key-Locking Insert Blanks

Tap the thread size you need into the solid body of these blanks. Made of steel, they’re stronger than stainless steel insert blanks.

Black-Phosphate Steel Easy-to-Install
Thread-Locking Inserts

A black-phosphate finish provides mild corrosion resistance.

18-8 Stainless Steel Easy-to-Install
Thread-Locking Inserts

Made of 18-8 stainless steel, these inserts have better corrosion resistance than black-phosphate steel.

316 Stainless Steel Easy-to-Install
Thread-Locking Inserts

These inserts are the most corrosion-resistant thread-locking inserts we offer.

Easy-to-Install Thread-Locking Insert Assortments

These assortments include various sizes of thread-locking inserts.

Easy-to-Install Thread-Locking
Inserts with Installation Tools

A closed-end tap, drill bit, and installation bit are included with these inserts.

Screw-Locking Easy-to-Install
Thread-Locking Inserts

Adhesive on both the internal and external threads keeps these inserts in place and holds screws tight.

Alloy Steel Thin-Wall Swage-Locking Inserts

Add or repair threads near the edges and corners of soft metal surfaces—these inserts have thinner walls than any of our key-locking and thread-locking inserts. Made of alloy steel, they’re stronger than our 17-4 PH stainless steel inserts.

17-4 PH Stainless Steel
Thin-Wall Swage-Locking Inserts

Position strong, corrosion-resistant threads close to the edges of soft metal surfaces. These inserts have thinner walls than our key-locking and thread-locking inserts, so they don’t need as much space around them.