MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in a durable insert. Designed for harsh environments, these connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Available in various configurations including front wall mount, rear wall mount, and jam nut receptacles, they feature RFI grounding plugs for added versatility. With 52 insert arrangements and M39029 rear release crimp contacts, they ensure reliable connections in sizes 22D, 22M, 22, 20, 16, and 8. The connectors boast high strength aluminum shells with different plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, catering to diverse application needs. Certified for RoHS compliance, they are ideal for demanding military and industrial environments, offering dependable performance with a maximum operating temperature of 150 °C.