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  • New Products
  • Assortment Packs
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  • Hex Socket (Allen) Screws
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    • Shop by Brand

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    • Metric

    Castellated nuts, often referred to as Castle or Slot nuts, is a nut with slots cut into one end. They are designed to use a split pin (cotter pin) that fits through the slots and through a hole in the screw to which the nut is attached. This pin prevents the nut from turning and loosening. Castle nuts are typically used in low torque applications.

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