McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Thread Type Thread Type

	For Tap Thread Size For Tap Thread Size

	Material Material

Stainless Steel

Steel

	Installed Length Installed Length

	Specifications Met Specifications Met

Mil. Spec.

NAS

	Key-Locking Insert Wall Style Key-Locking Insert Wall Style

Thin

Thick

Extra Thick

	For Minimum Material Thickness For Minimum Material Thickness

	For Tap Type For Tap Type

Standard (UN)

Metric

	Thread Spacing Thread Spacing

Coarse

Fine

Extra Fine

	Number of Locking Keys Number of Locking Keys

	2		4

	Drill Bit Size Drill Bit Size

	Thread Fit Thread Fit

	For Maximum Hole Diameter For Maximum Hole Diameter

	Thread Pitch Thread Pitch

	Finish Finish

Black Phosphate

Cadmium Plated

	Number of Inserts Included Number of Inserts Included

	For Tap Thread Pitch For Tap Thread Pitch

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How to Install Key-Locking Inserts

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

These inserts are made to stringent military specifications.

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. Alloy Steel
Key-Locking Inserts

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

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

Screw-Locking Key-Locking Inserts

With a distorted internal thread and keys on the outside, these inserts create a strong hold on both fasteners and surrounding material.

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How to Install Key-Locking Inserts

Key-Locking Inserts for Soft Metal

Mil. Spec. 18-8 StainlessSteel Key-Locking Inserts

18-8 Stainless SteelKey-Locking Inserts

Black-Phosphate SteelKey-Locking Inserts

Mil. Spec. Alloy SteelKey-Locking Inserts

Key-Locking Insertswith Installation Tool

Key-Locking Insert Assortmentswith Installation Tool

Screw-Locking Key-Locking Inserts

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

18-8 Stainless Steel
Key-Locking Inserts

Black-Phosphate Steel
Key-Locking Inserts

Mil. Spec. Alloy Steel
Key-Locking Inserts

Key-Locking Inserts
with Installation Tool

Key-Locking Insert Assortments
with Installation Tool