Coated threaded fasteners with coating-free crests

  • US 5,685,680 A
  • Filed: 05/02/1996
  • Issued: 11/11/1997
  • Est. Priority Date: 05/02/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. An externally threaded fastener that includes a screw thread with crests and roots, comprising:

  • the screw thread with the exception of the crests, having a contaminant-inhibiting coating with a thickness sufficient to impede the deposition of subsequently-applied thread-interfering materials; and

    the crests being substantially coating-free, thereby providing a threaded fastener having a discontinuous coating and a conductive path between the fastener and an electrical source while retaining its ability to substantially impede the deposition of the thread-interfering materials.

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