Patent ID: 8231318

Claim:
A nut, comprising: an outer shell having an outer surface, an inner circumferential surface having a inwardly extending flange, an upper rim portion; and an insert piece having an upper, outwardly extending portion and a plurality of downwardly extending projections, wherein each of the projections has an outer surface and an inner surface, wherein a portion of the inner surfaces of each of the projections is configured to allow the nut to engage a nut-receiving surface and the outer surfaces of the projections are configured to engage the inner circumferential surface of the first outer shell such that upon a longitudinal upward pushing action of a user, the inwardly extending flange of the outer shell presses upwardly on the upper, outwardly extending portion of the insert piece so that the portions of the inner surfaces of the projections configured to engage a nut-receiving surface move outwardly and upon removal of the pushing action, the portions of the inner surfaces of the projections configured to engage a nut-receiving surface move back inwardly, and wherein the inner circumferential surface of the outer shell is configured to engage the outer surface of the projections so that the threads are able to be moved away from or towards a nut receiving surface.