776427-4 is an AMPSEAL 16 2-way plug connector designed for environmentally sealed electrical connections in industrial and commercial transportation applications. The connector features a D key configuration with black housing and green polycarbonate locking ring (PLR), ensuring proper mating orientation and secure connections. It accommodates 1.58 mm contact size and includes a standard diameter seal for environmental protection. The connector is supplied with included wedge/TPA (terminal positioning aid) for proper contact installation. This plug connector is commonly used in automotive, industrial control, and transportation systems where reliable sealed connections are required in harsh environments.