The 2-1564337-1 is an HDSCS receptacle housing connector designed for 16-way electrical connections in industrial and commercial transportation applications. This connector features a group E configuration with a 4-key (blue) keying system and accommodates 12 contacts of 1.5K size and 4 contacts of 2.8 size, providing flexible contact arrangement for diverse wiring requirements. The housing is constructed in black with included wedge/TPA components for secure assembly and environmental sealing. This connector is commonly used in automotive and industrial control systems where reliable, keyed connections and environmental protection are essential for harsh operating conditions.