The HD34-24-21SN is a receptacle connector from the DEUTSCH HD30 series designed for industrial and commercial transportation applications. It features a 24 shell size with 21 socket contact positions and standard diameter wire seals (normal position, green ring). The connector is part of the HD30 family, which provides robust sealed connections for harsh environments including dirt, paint overspray, and pressure washing exposure. The receptacle housing dimensions are 1.22 inches (31.0 mm) in overall length and 1.29 inches (32.8 mm) in overall height. This connector is commonly used in vehicle electrical systems, agricultural equipment, and industrial control applications where reliable, sealed multi-position connections are required.