776524-1 is an AMPSEAL 16 series 4-way plug connector designed for environmentally sealed electrical connections in industrial and commercial transportation applications. This connector features a 1.58 mm contact size, A key polarization, black housing with red PLR (Positive Lock Retainer), and a reduced diameter seal configuration. The included wedge/TPA (Terminal Position Assurance) ensures secure contact retention. Ideal for harsh environment applications requiring reliable, sealed connections in automotive, agricultural, and heavy equipment systems.