Patent ID: 7410337

Claim:
A stud, comprising: a) a shaft that includes an axis, a first end, and a second end; b) the shaft is provided with a trilobular shape with a threaded surface; c) the threaded surface includes a locking thread, a guide thread, and a conventional thread; d) the guide thread includes a guide means for guiding the threads on the shaft into mating alignment with a female thread of a female threaded member; e) the guide thread is generally located at the first end of the shaft and leads directly into the conventional thread; f) the conventional thread is provided with a generally Vee-shaped root having a first root diameter configured to mate with the female threads of the female threaded member so as to be freely rotatable thereon; g) the conventional thread has a generally constant shape which extends for a plurality of turns and leads directly into the locking thread; and h) the locking thread includes a root surface provided with a second root diameter that is greater than the first root diameter, wherein the locking thread is configured to re-form the female threads to resist relative rotation between the shaft and the female threaded member.