Positive Lock Mark II Receptacles & Housings TE Connectivity's (TE) High-Temperature Positive Lock Mark II Receptacles and Housings feature terminals that operate in temperatures up to +250°C and housings that operate at +240°C. The receptacles feature an extension that includes nickel-plated steel receptacles and liquid crystal polymer housings. TE Positive Lock Mark II Receptacles enable ease of assembly with a low insertion force and help prevent unintentional disconnection with a locking feature on the receptacle.