Split threaded coupling nut

A split threaded coupling nut comprising a pair of first and second coextensive and generally semi-cylindrical nut halves, said nut halves including exterior surface portions engageable by hand or tools to facilitate turning of said halves, together, as a unitary nut, said nut halves including coextensively threaded inner surfaces, said first nut half including arc end generally radially outwardly projecting inner lugs including first abutment surfaces remote and facing in directions opposite from the corresponding arc end faces of said first nut half, and outer surfaces extending between said arc end faces and first abutment surfaces, the arc ends of said second nut half including outer peripheral extensions projecting outwardly therefrom and terminating outwardly in radially inwardly projecting outer lugs including second abutment surfaces remote and facing in directions opposite from the corresponding arc end faces of said second nut half, and inner surfaces extending between said second abutment surfaces and arc end faces, said first and second abutment surfaces being abuttingly engaged with each other and said first and second halves being separable upon relative shifting in axial directions, said halves being constructed of substantially rigid, but slightly resilient material, the outer surfaces of said inner lugs and the inner surfaces of said extensions including juxtaposed substantially coaxial arcuate surfaces, one set of arcuate surfaces including grooves formed therein extending circumferentially therealong and the other set of arcuate surfaces each including a central projection spaced closely adjacent the corresponding outer lug and snap seated in the corresponding groove.