Castle Nut



A  castle nut is a nut with slots cut into one end.

The name comes from the nut’s resemblance to the parapet of a castle.

The bolt or shaft which the nut tightens on is drilled at the required location.

The nut is then secured with a split pin or R clip

Castle nuts are used in low-torque applications, such as holding a wheel bearing in place.

Available with the following Coatings:

  • Zinc Plated
  • Hot Dip Galvanised
  • Sherardized
  • Dacromet
  • Rilsan

These are stocked in both metric and imperial thread forms as follows:

  • Metric coarse
  • Metric Fine
  • BA
  • UNF
  • UNC
  • Whitworth
  • BSF

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