These locknuts are about half the height of standard nylon-insert locknuts. Use them in light duty low-clearance applications or jam one against a hex nut to hold it in place. The nylon insert grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use.

Zinc-plated steel locknuts resist corrosion in wet environments.

For technical drawings and 3-D models, click on a part number.

An irregularly shaped thread at the top of the nut grips the bolt for a stronger hold than nylon-insert locknuts. They thread on from the bottom of the nut, allowing more threads to engage the bolt before tightening for easier installation than center-lock distorted thread locknuts. The strength of the bolt should match the strength of the nut to prevent damaging threads. They're not reusable. Comparable in strength to Grade 8 bolts, they're about 25% stronger than medium-strength steel locknuts.

Steel locknuts without a finish are ready to be painted or finished.

Black-oxide locknuts are mildly corrosion resistant in dry environments and blend in with dark surfaces.

Black-phosphate, zinc-plated, and zinc yellow-chromate-plated locknuts resist corrosion in wet environments.

Cadmium-plated locknuts resist corrosion in wet environments and have good lubricity, so they thread on smoothly.

For technical drawings and 3-D models, click on a part number.

These locknuts have an irregularly shaped thread in the middle of the nut that grips the bolt for a stronger hold than nylon-insert locknuts. Also known as reversible locknuts, they can be threaded on from either end. They're about three times stronger than low-strength steel locknuts. The strength of the bolt should match the strength of the nut to prevent damaging threads. They're not reusable.

Zinc yellow-chromate plated steel locknuts resist corrosion in wet environments.

For technical drawings and 3-D models, click on a part number.

Secure these hex slotted nuts by inserting a cotter pin or safety wire through the slots and a drilled hole in your bolt for mild loosening resistance. They’re not recommended for use on parts exposed to high vibration because the pin is prone to shearing under prolonged stress. Height includes the slots. Cotter pins are not included. They're zinc plated to resist corrosion in wet environments.

For technical drawings and 3-D models, click on a part number.

Serrations grip the material surface instead of the threads for easy installation and mild vibration resistance. The flange distributes pressure where the nut meets the material surface, eliminating the need for a separate washer. They're about 25% stronger than medium-strength steel flange locknuts. Height includes the flange.

Zinc-plated steel flange locknuts resist corrosion in wet environments.

For technical drawings and 3-D models, click on a part number.