MIL-DTL-38999 Series I connectors feature up to 128 contacts within an insert, designed for harsh environments with an operating temperature range from -65 °C to 200 °C. Offering front wall mount, rear wall mount, and jam nut receptacles, they ensure secure connections. These connectors, compliant with military specifications, come in 9 shell sizes and 52 insert arrangements, with M39029 rear release crimp contacts. Constructed with high strength aluminum shells, they provide durability and reliability. Various plating options, including cadmium-free finishes, cater to diverse application needs. With gold contact plating, they guarantee efficient conductivity, making them ideal for demanding environments. The bayonet coupling and environment-resistant design ensure secure and stable connections, suitable for a wide range of industrial and military applications.