| 摘要 |
<p>The expanding nog or insert comprises an outer sleeve (1) provided for insertion into a hole (9) as formed in a wall, and provided with an expanding portion (10) and an outer flange (2). Within the sleeve (1) a shank (4) is able of sliding, provided with a preferably countersunk head portion (5) and projecting from the outer or embedded into the wall flange (2) for a length to be engaged by a riveting machine (8). The shank (4) is further provided with a weakened portion (6) for breaking the shank (4) after application.</p> |
