MIL-DTL-38999 Series I connectors offer up to 128 contacts within a durable insert, ideal for harsh environments with an operating temperature range of -65°C to 200°C. Featuring front and rear wall mount options, as well as jam nut receptacles, this connector family ensures secure and reliable connections. With 52 insert arrangements available, including M39029 rear release crimp contacts, these connectors provide versatility for various applications. Constructed with high-strength aluminum shells and offering multiple plating options, such as gold and electroless nickel, they guarantee excellent performance and longevity. Meeting MIL-DTL-38999 I military specifications, these circular receptacles are suitable for demanding environments, ensuring reliable connectivity in critical operations.