The 177627-1 is a single-circuit receptacle housing from the Positive Lock Mark II 250 Series. It is constructed from natural-colored 6/6 Nylon with a UL 94 V0 flammability rating. This Style B housing insulates the terminal and provides a locking mechanism that secures onto mating tabs, giving an audible 'snap' upon proper connection. The positive locking feature enhances safety and connection reliability by preventing accidental disconnection in applications such as automotive dashboards or recessed switches.