MIL-DTL-38999 Series I connectors, designated as MS27656, are high-performance electrical receptacles designed for back panel wall mounting applications in harsh environments. Featuring a durable aluminum shell with an electroless nickel finish, these connectors offer superior conductivity and environmental resistance, making them ideal for military and aerospace applications. With a maximum operating temperature of 200°C and a wide range of insert arrangements, including 128 removable crimp contacts, they provide reliable performance in extreme conditions. The bayonet coupling mechanism ensures secure mating, while the included RFI grounding plugs offer added protection. RoHS compliant and available in various shell sizes, the MS27656 connectors are a dependable choice for mission-critical systems.