(under the class definition) Structure wherein at least one member is modified or particularly shaped at the locus of the connection or is made of a particular material and wherein the modification, shape, or material is essential to the connection.
SEE OR SEARCH CLASS
411, Expanded, Threaded, Driven, Headed, Tool-Deformed, or Locked-Threaded Fastener, appropriate subclasses for a member modified only to provide a preformed aperture to receive a bolt, screw, nail, rivet, etc.
