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Choose these locknuts for their adherence to strict military standards for material and construction. 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. A cadmium plating provides corrosion resistance in wet environments and adds lubricity so they thread on smoothly.

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

Choose these locknuts for their adherence to strict military standards for material and construction. They have good chemical resistance and may be mildly magnetic. About half the height of standard nylon-insert locknuts, use them in 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.

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

These stainless steel locknuts have good chemical resistance and may be mildly magnetic. Also known as Keps and K-Lock nuts, they have a free-spinning tooth lock washer that grips the material surface instead of threads for easy installation and mild vibration resistance. Height includes the thickness of the washer.

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

These locknuts have a curved washer that acts as a spring to add tension between the nut and the material surface for easy installation and mild vibration resistance. The smooth rim makes them less likely to scratch materials when tightened than locknuts with a tooth lock washer. Also known as Keps and K-lock nuts.

Black-oxide locknuts are mildly corrosion resistant and have a dark surface color.

Zinc-plated locknuts have an outer layer of zinc that provides corrosion resistance in wet environments.

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

Choose these locknuts for their adherence to strict military standards for material and construction. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. Threads at the top of the nut expand to grip the bolt on all sides for a stronger hold than distorted-thread locknuts. The strength of the bolt should match the strength of the nut to prevent damaging threads. A silver plating adds lubricity so they thread on smoothly.

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

Choose these flange locknuts for their adherence to strict military standards for material and construction. They have an irregularly-shaped thread that grips the bolt for a stronger hold than nylon-insert flange locknuts. A flange that distributes pressure where the nut meets the material surface, eliminating the need for a separate washer. They're not reusable. A cadmium-plating provides corrosion resistance in wet environments. Height includes the flange.

Locknuts with lubricant keep screws from binding to the locknuts while you tighten them. They’re often used with screws made from soft metals, such as aluminum, which are more likely to bind to the locknuts than harder materials such as steel.

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

These flange locknuts have excellent resistance to chemicals and salt water. They have an irregularly-shaped thread that grips the bolt for a stronger hold than nylon-insert flange locknuts. A flange that distributes pressure where the nut meets the material surface, eliminating the need for a separate washer. They're not reusable. Nuts may be mildly magnetic. Height includes the flange.

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

These nylon flange locknuts form threads as they're tightened to resist vibration. The flange distributes pressure where the nut meets the material surface, eliminating the need for a separate washer. They're not reusable. Made from nylon 6/6, they're chemical resistant, nonconductive, and lightweight. Height includes the flange.

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