The threads at the top of these locknuts expand to grip the bolt on all sides for a stronger hold than distorted-thread locknuts.

Often referred to as Keps nuts, these have a free-spinning lock washer that grips the surface instead of the threads for easy installation and mild vibration resistance.

Also known as castle nuts, secure these nuts by inserting a cotter pin or safety wire through the slots in the nut and a drilled hole in your bolt for light duty locking applications.

These locknuts include a flex-top locknut that expands to grip the bolt on all sides and a concave jam nut that clamps the threads onto the bolt for added vibration resistance. They're also known as drake-style nuts.

Serrations grip the material surface instead of the threads for easy installation and mild vibration resistance.

The nylon cap covers and grips the threads to resist loosening.

Fasten these panel nuts with a wrench for more torque while tightening than knurled panel thumb nuts.

Attach these slip-on nuts at any point on a threaded rod for quick installation.

These press-fit nuts have a nylon insert that grips threads to resist loosening.

A flange distributes the load over a large area and reduces stress where the nut meets the material surface.