MIL-DTL-38999 Series I connectors offer robust performance in harsh environments with up to 128 contacts housed in an insert. These circular receptacles, available in various shell sizes and insert arrangements, feature front and rear wall mount options, as well as jam nut receptacles for secure installations. Constructed with high-strength aluminum shells and offering multiple plating choices including RoHS-compliant finishes, they ensure durability and reliability. With an operating temperature range from -65 °C to 200 °C, these connectors are suitable for a wide range of applications requiring rugged connectivity. The included M39029 rear release crimp contacts, in sizes 22D, 22M, 22, 20, 16, and 8, guarantee efficient and secure connections. Meeting MIL-DTL-38999 I specifications, these connectors are designed for demanding military and industrial environments, providing excellent conductivity and ingress protection.