| 摘要 |
An external surface for a fastener insert (10) to be embedded in a component (140) includes waterfall threads (16) extending along an outer surface of the portion to be embedded. The waterfall thread includes a first portion (20) and second portion (22), the first portion being more axially oriented on the surface than the second portion, and the second portion being more circumferentially oriented on the surface than the first portion. Continuous transitions (24) are provided between adjacent first and second portions in a thread. |
