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split pin

a metal pin made by bending double a wire, often of hemispherical section, so that it can be passed through a hole in a nut, shaft, etc, to secure another part by bending back the ends of the wire
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Examples from the Web for split pin
Historical Examples
  • Every bolt, screw and split pin was taken out and made useless.

    The Everett massacre Walker C. Smith
  • The split pin should be passed through the bolt as near as possible to the nut.

  • Another use of this plier, also indicated, is to bend over the ends of the split pin in order to prevent it from falling out.

    Aviation Engines Victor Wilfred Pag
  • To use, the open end of the tube is pushed over the valve stem and a split pin pushed through the tube and stem.

    Aviation Engines Victor Wilfred Pag
  • The simplest form of pin used for this purpose is the split pin, shown in Fig. 431.

  • Additional security is obtained by drilling a hole through the point of the bolt, and fitting it with a split pin E.

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