| 摘要 |
A fastener (10) with multiple thread characteristics includes a shank (12 ) and head (14). The shank (12) has a penetrating tip (22) distal most from the head (14). The shank (12) includes a first, conventional thread formatio n (24) formed therein adjacent the penetrating tip (22) and a second, anti-b ack-out thread formation (26) adjacent the conventional thread formation (24 ), between, the conventional thread formation (24) and the head (14). |
