MS27656E25B4SD is a high-performance MIL-DTL-38999 Series I connector, designed for rugged environments with its back panel wall mounting configuration. Featuring 56 gold-plated removable crimp contacts, this connector ensures reliable conductivity under extreme conditions, with a wide operating temperature range from -65°C to 175°C. Its aluminum shell construction and electroless nickel or cadmium olive drab finish provide excellent durability and corrosion resistance. Engineered for military and aerospace applications, this connector is RoHS compliant, making it ideal for use in environmentally sensitive industries. With a mating type of bayonet and a service rating of I, it guarantees secure and efficient connections, with a service class detail of E for enhanced performance in demanding environments.