The MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an environmentally sealed insert, designed for rugged applications with an operating temperature range of -65°C to 200°C. Available in various shell sizes and insert arrangements, these connectors offer versatility with front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Utilizing M39029 rear release crimp contacts, they ensure secure connections in sizes 22D, 22M, 22, 20, 16, and 8 (coax and twinax). Constructed with high-strength aluminum shells and offering plating options such as electroless nickel and cadmium finishes, including RoHS certified variants, they meet stringent military specifications for durability and performance in harsh environments.