Patent ID: 8496422

Claim:
A threaded fastener-nut combination for attaching two work pieces together, each work piece having a bore, the fastener-nut combination having means for preventing the intrusion of the fastener threads into the bores of each workpiece, the means for preventing intrusion of the fastener threads into the bores comprising: a stud member having an outside diameter and a first end and a second end defining a longitudinal axis, the first end and the second end comprising threads, the stud member further comprising a grip length between the first end and the second end; the first end comprising a pawl member, the pawl member having a tapered end and an opposite facing terminal end, the tapered end and the terminal end defining a long axis of the pawl member wherein the long axis is perpendicular to the longitudinal axis, the pawl member having a first position in which both the tapered end and terminal end are completely enclosed within the first end, and a second position in which the tapered end extends beyond the outside diameter; and an encapsulating nut body having a top, a bottom, and interior threads matching the threads of the first end, the top of the nut body having an aperture for receiving a portion of the tapered end when the nut body is sufficiently rotated onto the threads of the first end such that the aperture is disposed adjacent to the tapered end, wherein receipt of the tapered end into the apertures causes the nut body to be lockingly engaged by the stud member before the threads of the first end enter the bores of the work pieces.