MS3112E12-8P is a miniature cylindrical box mounting receptacle connector designed for reliable electrical connections in aerospace and military applications. It features 8 contacts with size 20 pins, solder termination, and bayonet coupling per MIL-C-26482 Series 1 specifications. The connector has a shell size of 12 and is rated for Service Class 1 operation. It is available with environmental resisting (Class E) termination assembly, providing protection against moisture and corrosion. This connector is commonly used in avionics, military equipment, and other demanding environments where robust, compact interconnections are required.