776437-3 is an AMPSEAL 16 series 12-way plug connector designed for environmentally sealed electrical connections in industrial and commercial transportation applications. This connector features a C key coding configuration with a black housing and yellow PLR (Positive Lock Release) for secure mating and easy identification. The plug accommodates 1.58 mm contact size and includes a standard diameter seal for environmental protection. The connector comes with an included TPA (Terminal Position Assurance) wedge for reliable contact retention. Ideal for harsh environment applications requiring robust, sealed connections in automotive, agricultural, and industrial equipment.