A segmented, quick connect nut held together by a resilient ring. The segments spread apart to slip over a threaded bolt or stud. The base of the nut is conical and is mounted against an associated washer having a conical seat to receive the base and jam the segments together whenever the nut is tightened upon the bolt. The nut has a conical cavity at the head end, opposite the base, and the conical seat of a holding tool engages this cavity to facilitate spreading the segments whenever the nut is being threaded into position upon the bolt. A removal tool spreads the segments to remove the nut from the bolt once it is loosened from its seat in its associated washer.