Patent ID: 8845256
Filing Date: 2014-09-30
Classification: F16B,Y10S

Abstract:
1. A fastener comprising: a cylindrical shaft; a head attached to the shaft; and, two or more external, longitudinal threadforms, each threadform comprising a plurality of spaced protrusions forming a separate helical path around the shaft; wherein when the shaft is inserted into a corresponding mating receptacle, a combination of the shaft and the mating receptacle provides two or more pitches, and further wherein the plurality of spaced protrusions comprise a plurality of locking spaced protrusions and a plurality of non-locking spaced protrusions, wherein the plurality of locking spaced protrusions are proximate the head and are of a greater size compared to the non-locking spaced protrusions, such that when the shaft is inserted into the corresponding mating receptacle, the locking spaced protrusions and the corresponding mating receptacle form a locking mechanism that locks the corresponding mating receptacle to the shaft.