| 摘要 |
<p>A weld stud having a cylindrical section (1) permitting engagement by a stud welding gun, joined by a shoulder on to a threaded shank (7) covered up to the shoulder by a cap nut (8) made of plastics, wherein the cylindrical section changes through a chamfer (5) into a shoulder (6) and the cap nut (8) is provided with a resilient lip (10), which stretches to cover the chamfer (5) when the cap nut (8) is brought into contact with the shoulder (6). The threaded shank (7) may have a ridge close to the shoulder (6) which engages in a corresponding annular recess (12) inside the cap nut (8). The cap nut (8) may have a coaxial, preferably conical, projection (14) at its end opposite the lip.</p> |
