The MIL-DTL-38999 Series I connectors, also known as MS27505, are high-performance electrical receptacles designed for harsh environments. Featuring a back panel box mounting flange, these connectors are secure and reliable for military and aerospace applications. With a rugged aluminum shell and gold-plated removable crimp contacts, they offer excellent conductivity and durability. Rated for operating temperatures between -65 °C and 175 °C, they are suitable for extreme conditions. With 55 contacts in a size 17 shell, they provide ample connectivity in a compact design. The connectors are environmentally sealed and have a bayonet coupling for easy and secure mating. Available with RoHS compliant finishes, including electroless nickel and cadmium olive drab, they meet stringent environmental standards. With a service rating of M and a service class of E, these connectors are trusted for critical operations. Whether for military vehicles, aircraft, or industrial machinery, the MIL-DTL-38999 Series I connectors deliver reliable performance in demanding environments.