Inset panel fastener

An inset panel fastener for being received into a structural cavity and male fastener combination for affixing objects to a structure, the inset panel fastener and male fastener combination comprising:

• a male threaded fastener element having a male helical thread;
• and
• an inset panel fastener including;
• a plastic body and a metal female threaded nut;
• said plastic body including a cylindrical barrel shape and having a top proximal extremity, a bottom distal extremity and a bore extending through said body to form a central chamber, said top further including an opening for receipt of said male threaded fastener element and said bore extending through said body to define a longitudinal axis;
• said metal female threaded nut positioned within said body's bore at said body's top proximal extremity, said metal female threaded nut having a helical female metal locking thread having a plurality of rotations, said female metal locking thread being concentrically aligned with said bore's longitudinal axis for receipt of a male threaded fastener element;
• and
• said plastic body further including at least one helical female plastic non-locking thread integrally formed into said bore, said female plastic non-locking thread having the same diameter as the female metal locking thread, and said female plastic non-locking thread positioned concentric and immediately distal to said metal thread so that said female metal locking thread and said female plastic non-locking thread forms a continuous thread for permitting threaded receipt of said male threaded fastener element through both said metal female thread and said plastic female thread;
• said female metal locking thread distorted relative to said female plastic non-locking thread such that said male fastener fastening to said inset panel fastener causes said male thread to have greater friction and thus greater locking with said metal locking thread than said plastic non-locking thread.