MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various mounting options including front wall mount, rear wall mount, and jam nut receptacles, they offer RFI grounding plugs for added functionality. With 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8 (coax and twinax). Crafted from high-strength aluminum, they come with plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, catering to diverse needs. RoHS certified cadmium-free finishes are also available, ensuring compliance with environmental standards. Suitable for military applications, the MIL-DTL-38999 I connectors are known for their reliability in demanding conditions.