The housing is blue polybutylene terephthalate (PBT), glass-filled, and carries a JIS C 0920 Grade Level 7 rating, which is the Japanese equivalent of IP67: the mated pair seals against dust ingress and temporary immersion in water. That makes this receptacle suited for outdoor, washdown, or engine-compartment harnesses where moisture is a concern.
The housing ships empty. The note on the line is clear: contacts are not included. This is the most common trip-up when filling a BOM from this order code: the housing alone does not complete the circuit. Plan the terminal order at the same time as the housing to avoid a split shipment.
This receptacle mates with the WPJ series male header (the pin side). The free-hanging mount lets you use it as an in-line splice or a harness-to-device connector — no board required. The single-row, 2-position layout is straightforward: two cavities side by side, no polarity keying beyond the housing shape, so confirm the wire orientation before seating the terminals.