The MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range from -65 °C to 200 °C. Available in various mounting options including front wall mount, rear wall mount, and jam nut receptacles, they offer versatility for different applications. These connectors, compliant with MIL-DTL-38999 I military specifications, utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8 for reliable connections. Constructed with high-strength aluminum shells and offered in different plating options such as electroless nickel and cadmium finishes, they ensure durability and performance. Suitable for box mounting applications, these connectors, with a service rating of I, are ideal for demanding environments requiring secure and efficient connectivity.