Keensert® Inch & Mil-Spec Heavy Duty Inserts - MS51831, KNH Series, Locking and Non-Locking

Looking for MS51831 / KNH Heavy Duty Key-locking Inserts?

We carry the MS51831 / KNH Heavy Duty series in both locking and non-locking styles.

Stock sizes include 8-32 through 1-12 in Stainless steel.

Additional materials and sizes are available upon request.

Scroll down to find your size, or search by part number.

Add to Cart and buy online or email us for a custom quote.  Most popular products are in stock and ship within 24 hours.

Can't find what you're looking for? Email us at [email protected] for a custom quote. "We have the right screw for you" is our motto after all!