MS3106E20-19S is a MIL-DTL-5015 Matrix circular connector plug designed for military and aerospace applications. This connector features 19 contacts in size 16 configuration with crimp rear release contact technology, supporting wire ranges of 20-16 AWG (0.5-1.4 mm²). The connector is equipped with a threaded shell meeting UNEF thread specifications (1.0000-20 UNEF for the H thread class 2A), providing secure mechanical coupling. The shell dimensions include a B diameter of 1.005/0.996 inches and an overall length designed for standard panel mounting applications. This connector is widely used in military avionics, ground support equipment, and harsh environment applications where reliable electrical connections and mechanical durability are essential.