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10551

CASTLE NUT D979 *LOW* 12MM X 1.5P

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A castle nut is a hexagonal nut with slots cut into one end, resembling the turrets of a castle. It is used with a drilled bolt or stud and secured with a split pin (cotter pin) passed through the slots and hole to prevent loosening. This locking method makes castle nuts ideal for critical assemblies where vibration resistance and safety are essential.