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 of -65 °C to 200 °C. Available in various configurations including front wall mount, rear wall mount, and jam nut receptacles, these connectors offer reliable RFI grounding. With 52 insert arrangements and M39029 rear release crimp contacts, they ensure secure connections in sizes 22D, 22M, 22, 20, 16, and 8 (coax and twinax). Encased in high-strength aluminum shells with a choice of plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, they meet stringent military specifications for durability and performance. RoHS compliant finishes are also available, catering to diverse industrial needs.