The MS3106F20-29S is a 17-position military standard Straight Plug with socket type silver-plated copper contacts and 20-29 insert arrangement. Shell components are fabricated from high grade aluminum alloy. The standard hardware plating is electrically conductive cadmium-plated finish with an olive drab chromate after-treatment for corrosion resistance. Resilient neoprene inserts provide an outstanding moisture barrier, high dielectric strength and resistance to vibration. This connector represents well-proven electrical capability at an acceptable cost for most equipment where durability is important. The MIL-C-5015 series circular connector features threaded coupling, single key and keyway polarization representing maximum simplicity in design. This connector is recommended for conditions where vibration, moisture, pressure and temperature are extreme.