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Rivet Nut

 Rivet Nut

  • Is defined that  is a blind installed, internally-threaded rivet invented in 1936 by the Goodrich Rubber Company for the purpose of attaching a rubber aircraft wing deicer extrusion to the leading edge of the wing.
  • The original rivet nut is the Rivnut currently manufactured by Bollhoff Rivnut Inc. The Rivnut became widely used in the military and aerospace markets because of its many design and assembly advantages.
  • Rivet nuts are used for the installation of fairings, trim, and lightly loaded fittings that must be installed after an assembly is completed. the rivet nut is available in two types: countersunk or flathead.
  • Installed by crimping from one side, the rivet nut provides a threaded hole into which machine screws can be installed. Where a flush fit is required, the countersink style can be used. Rivet nuts made of alloy steel are used when increased tensile and shear strength is required.

Hole Preparation

  • Flathead rivet nuts require only the proper size of the hole while flush installation can be made into either countersunk or dimpled skin. Metal thinner than the rivet nut head requires a dimple.
  • The rivet nut size is selected according to the thickness of the parent material and the size of the screw to be used. The part number identifies the type of rivet nut and the maximum grip length.
  • Correct installation requires good hole preparation, removal of burrs, and holding the sheets in contact while heading. Like any sheet metal fastener, a rivet nut should fit snugly into its hole.


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