776488-2 is an AMPSEAL 16 4-way connector cap designed for industrial and commercial transportation applications. It features a B key configuration with black housing and gray polymer locking ring (PLR), providing keyed mating protection and environmental sealing. The connector utilizes 1.58 mm contact size with a standard diameter seal for reliable electrical connections in harsh environments. This cap connector is included with wedge/TPA accessories and is commonly used in automotive, industrial control, and transportation systems where secure, sealed connections are required. The standard diameter seal design ensures compatibility with standard AMPSEAL 16 receptacles and plugs across the connector family.