| 摘要 |
<p>An improved fastener (10) has a head section (12) and an axially extending shank section (14). A thread convolution '120) is disposed in a coaxial relationship with the head and shank sections. An improved holding action against rotational and axial movement of the fastener relative to a metal base member is promoted by a plurality of radially extending wedge-shaped compression ramps (24-34), which are disposed on the head section (12) and slope radially and axially inwardly toward the shank section (14). The compression ramps (24-34) are effective to force metal of the base member into an annular groove (42) to hold the fastener against being pushed or pulled axially outwardly from the base member. The compression ramps (24-34) also force the metal of the base member radially inwardly against corners formed on the shank section (14) of the fastener to hold the fastener against rotation.</p> |
