The 776487-4 is a 4-way, D-keyed plug belonging to the AMPSEAL 16 connector series, intended for environmentally sealed, in-line applications. This connector features a black thermoplastic housing and a distinct green Primary Latch Reinforcement (PLR) that ensures proper contact alignment and retention. It is designed to accept HDSF 16 contacts for wire gauges ranging from 14 to 20 AWG and can handle currents up to 13 amps. With an IP67 immersion rating and an operating temperature range of -40°C to +125°C, the 776487-4 provides a durable and reliable connection for harsh environments, such as those in industrial and commercial transportation.