Metal Nuts

Castle Nuts

Slotted nuts are highly secure, anti-vibration mechanical fasteners featuring a series of radial slots cut into the top portion of the nut body. They are designed to align with a pre-drilled transverse hole in the mating bolt or shaft, allowing a cotter pin or safety wire to pass through, thereby establishing a positive mechanical lock against rotational loosening. Manufactured predominantly from high-strength carbon or stainless steel, these highly reusable fasteners are ubiquitous in safety-critical applications including automotive wheel bearings, heavy industrial turbines, and aerospace landing gear where standard friction nuts would fail under dynamic stress.