The MIL-DTL-38999 Series I connectors feature front wall mount, rear wall mount, and jam nut receptacles, designed for harsh environments. With up to 128 contacts in an insert, they offer reliable connectivity in extreme conditions. These connectors, compliant with military specification MIL-DTL-38999 I, are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Constructed with high-strength aluminum shells, they come in nine shell sizes and 52 insert arrangements, accommodating various applications. Utilizing M39029 rear release crimp contacts, they ensure secure connections, with options for gold plating and RoHS-compliant finishes. Suitable for demanding military and industrial environments, these connectors provide durability and performance, meeting stringent quality and reliability standards.