Castle Nuts

A castle nut, also known as a castellated nut or slotted nut, is a specialized type of fastener designed for use with a cotter pin or a safety wire to secure it in place. It typically has a circular, notched top with slots or grooves that resemble the turrets of a castle, hence the name. Castle nuts are commonly used in situations where vibration or movement could cause a standard nut to loosen. By using a cotter pin or safety wire through the slots in the nut and a hole in the threaded bolt or shaft, the castle nut can be effectively locked in place, preventing it from backing off unintentionally. These nuts are frequently found in applications such as automotive, aerospace, and machinery, where safety and reliability are paramount. Castle nuts come in various sizes and materials to suit different requirements.
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