7-WAY REC.

It provides the electrical connection point on the back of a truck or trailer for the 7-way plug, powering tail lights, brake lights, turn signals, and auxiliary functions. The 'non-circuit breaker' or 'without housing' designation means it is just the pin receptacle insert and not the complete enclosed assembly, commonly replaced when pins become corroded, bent, or burnt out from electrical faults. It is typically used to rebuild an existing junction box or replace a damaged socket on semi-trucks and heavy trailers.