776524-3 is an AMPSEAL 16 4-way plug connector designed for environmentally sealed electrical connections in industrial and commercial transportation applications. The connector features a 1.58 mm contact size with C key keying, black housing, and yellow polycarbonate locking ring (PLR) for secure mating. It incorporates a reduced diameter seal configuration that provides environmental protection while maintaining compact dimensions. The connector is supplied with included wedge/TPA (secondary locking) components for enhanced retention and reliability. This product is commonly used in automotive, heavy-duty truck, and industrial equipment where robust, sealed electrical connections are required to withstand harsh environmental conditions.