| 摘要 |
PROBLEM TO BE SOLVED: To provide a fastener which can be installed in a workpiece by either swaging or torquing methods so that the number of types of fasteners used by manufacturers can be reduced.SOLUTION: Provide is a fastener (20) installed in a workpiece (28) by either a swaging operation or a torquing operation. The fastener includes an enlarged protruding head (22) which is proximal to a substantially cylindrical smooth shank portion (30). A threaded shank portion (38) positioned distally to the smooth shank portion includes a male thread which is sufficiently strong to have a swage collar (46) swaged onto it. Distal to the threaded shank portion is a pin tail portion (48) having a surface shaped to allow engagement with a tool. Positioned between the threaded shank portion and the pin tail portion is a bottleneck groove (50) having a lower tensile strength than any other portion of the fastener. |
