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Metal fastener

  • US 9,447,809 B2
  • Filed: 11/30/2015
  • Issued: 09/20/2016
  • Est. Priority Date: 07/19/2013
  • Status: Active Grant
First Claim
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1. A metal fastener comprising an expanded head and a smooth shank extending in an axis of revolution, characterized in that the shank comprises at least one portion treated by anode oxidation and at least one lubricating portion, wherein the at least one portion treated by anode oxidation and at least one lubricating portion are disposed continuously along the axis of revolution (A) of the fastener and wherein the at least one lubricating portion has a side portion disposed continuously along the axis of revolution and anode oxidation extends in a circumferential direction away from the side portion.

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