Self-aligning nut

A self-aligning nut, also known as a spherical nut[1] or leveling nut, is a type of nut that is used in applications where the fastener is not perpendicular to the surface the nut anchors to. It achieves this action by using a flanged nut inside a specially shaped dished-out washer. They are commonly used in the aerospace industry. If this nut were not used the object would have to be spot faced perpendicular to the fastener.[2]

References

  1. ↑ Spherical nuts & washers, retrieved 2009-04-20.
  2. ↑ Smith, Carroll (1990), Carroll Smith's Nuts, Bolts, Fasteners, and Plumbing Handbook, MotorBooks/MBI Publishing Company, p. 108, ISBN 0-87938-406-9.
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