Patent ID: 6719510
Filing Date: 2004-04-13
Classification: F16B

Abstract:
A fastener comprising:a bolt having a head and a shank extending axially from the head, the shank having a smooth section and a threaded gripping section having a at least one helical thread having a trunctuated vent angled surfaces formed between a spiral groove, the shank further having a locking groove adjacent the threaded gripping portion and a locking shoulder adjacent the locking groove opposite the threaded gripping section, each of the locking groove and the locking shoulder having a diameter smaller than a minor diameter of the threads in the threaded gripping section; and a cylindrical collar having a threaded portion having a thread shaped to mate with the thread on the shank and having a swage portion, the swage portion having an end opposite the threaded portion, whereby the collar is fastened to the bolt by threading the threaded portion of the collar onto the threaded gripping section of the bolt and swaging the swage portion of the collar into the locking groove of the bolt, whereby the end of the collar extends beyond the locking shoulder of the shank and wherein approximately 90 to 95 percent of a load capability of the fastener is carried by the threaded gripping section of the shank and the threaded portion of the collar.