Change thread sizes or types, such as fine to coarse threads, on parts without changing gender.

Change inch threads to metric with these adapters, or swap metric threads for inch. An external hex lets you tighten or loosen them with a wrench.

One side inch, one side metric, and a hex in the middle—these handy fasteners connect two female-threaded parts, such as coupling nuts, adapting from inch threads to metric. Tighten with a standard wrench.

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

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

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

A distorted thread grips the screw to resist loosening.

Made of Nitronic 60 stainless steel, these inserts prevent the screw from binding or sticking without any coating or lubricant that could contaminate particle-free environments.

Made of nickel alloy, these inserts are more resistant to acids and salt water than stainless steel inserts.

Assortments include various sizes of helical inserts and a tap, a drill bit, and an installation tool for each thread size.

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

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

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

The tapered shape makes it easier to guide these inserts into a hole during installation. Use a drill bit to create a straight hole, then taper the top half.

Made from brass, these inserts are electrically conductive, nonmagnetic, and have good corrosion resistance.

These aluminum inserts are 70% lighter than brass inserts, electrically conductive, and nonmagnetic. They have good corrosion resistance, which is comparable to brass but not as good as stainless steel.

These 18-8 stainless steel inserts have excellent resistance to chemicals and may be mildly magnetic.

Steel inserts have high strength for durability.

The flange keeps these inserts from being pulled through a hole and provides a load bearing surface.

Steel inserts have high strength for durability.

Six prongs around the barrel of these inserts provide a strong hold and prevent them from loosening and twisting.

Ridges on the barrel of these inserts make them less likely to split hardwood than inserts with prongs. They're often used in wood that has been cut across the growth rings.

The most corrosion resistant twist-resistant rivet nuts we offer, these stand up to chemicals.

These aluminum rivet nuts are one-third the weight of steel rivet nuts and have mild corrosion resistance.

A hex-shaped body provides the highest twist resistance of any rivet nut.

These kits include one size of low-profile rivet nuts.

These low-profile rivet nuts are one-third the weight of steel and have mild corrosion resistance.

A PVC foam seal under the flange keeps liquids and gasses from leaking between the nut and the surrounding material.