Key-Locking Inserts | McMaster-Carr

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778 Products

How to Install Key-Locking Inserts

18-8 Stainless Steel Key-Locking Inserts

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

Black-Phosphate Steel Key-Locking Inserts

A black-phosphate finish provides mild corrosion resistance.

Mil. Spec. 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.

Aligning Key-Locking Inserts

Install threads that align with off-center parts. These inserts have floating threads that account for misalignment, allowing you to insert screws at a slight angle as you fasten two parts together.

Closed-End Key-Locking Inserts

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

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 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.

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.

18-8 Stainless Steel Key-Locking Insert Blanks

Tap the thread size you need into the solid body of these blanks. Made of 18-8 stainless steel, they resist corrosion from mild chemicals and water.

Threaded Insert Tools

Installation Tools for Key-Locking Inserts

Place the tip of these tools into an insert and strike them with a hammer to drive the keys into the material. They’re compatible with Keensert® inserts.

Heavy Duty Installation Tools
for Key-Locking Inserts

Install key-locking inserts, including Keensert®-style inserts.

Installation Tools for Aligning Key-Locking Inserts

Leave hand fatigue behind when installing lots of aligning key-locking inserts.

Installation Tools for Key-Locking Insert Blanks

Strike these tools with a hammer to drive key-locking insert blanks into your material.