MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with a wide operating temperature range of -65 °C to 200 °C. Offering front wall mount, rear wall mount, and jam nut receptacles, these connectors ensure secure connections. With 9 shell sizes and 52 insert arrangements available, they accommodate various applications. Utilizing M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax options, they provide versatility. Constructed with high-strength aluminum shells and offering plating options like cadmium and nickel, these connectors are durable and reliable. Suitable for military and industrial use, they meet stringent standards for performance and environmental protection.