| 摘要 |
A lockbolt (100, 200) which includes a head portion (102) and a shaft (104) which extends from the head portion (102). The shaft (104) includes at least a portion which is threaded and has a multi-lobular profile. A collar (120) is swageable onto the multi-lobular threaded portion (104), and thereafter the lobes (114) provide that the collar (120) does not tend to vibrate loose from the threading. The fact that the section which has a multi-lobular profile is also threaded provides that the collar (120) (or a conventional threaded nut) can be selectively rotatably removed and re-installed on the lockbolt (100, 200). Before swaging, the collar (120) may initially include a cylindrical bore (130), or a bore (130) which is multi-faceted, preferably generally corresponding to the profile of the multi-lobular portion of the lockbolt (100, 200). The lockbolt (100, 200) may also include a frangible pintail (106, 202), wherein the multi-lobular threaded portion is disposed between the head portion of the bolt and the frangible pintail. |
