Patent ID: 6981829

Claim:
A fastener assembly comprising: a) a torquing member and a clamping member assembled on a common axis; b) the torquing member is provided with threads formed around the axis and an annular bearing surface extending around the axis on one end; c) the clamping member is provided with an annular bearing surface formed around the axis on one end and facing the torquing member bearing surface; d) the annular bearing surface on the torquing member includes a plurality of helically inclined surface segments, wherein the surface segments include a first pitch that is substantially equal to a pitch on the threads and the surface segments include a second pitch, with opposite incline relative to the threads; and e) the annular bearing surface on the clamping member includes a plurality of helically inclined surface segments, wherein the surface segments include a first pitch that is substantially equal to the pitch on the threads and the surface segments include a second pitch with opposite incline relative to the threads.