A slotted nut, also known as a castle nut, is a specialized fastener designed to be used with a drilled bolt or shaft and secured with a cotter pin.
The six evenly spaced vertical slots on the nut’s top allow the pin to pass through the nut and bolt, preventing loosening under vibration or torque.
This model is made from zinc-plated carbon steel, offering excellent corrosion resistance and durability in demanding environments.
Its hexagonal base allows for tightening with a standard spanner, while the machined slots are carefully cut for precise alignment with the bolt hole.
Slotted nuts are widely used in automotive wheel hubs, machinery linkages, agricultural equipment, and aerospace assemblies, where safety and reliability are critical.