MIL-DTL-38999 Series I connectors offer rugged performance in harsh environments, featuring up to 128 contacts within an insert and sealed for protection. Operating reliably in temperatures ranging from -65°C to 200°C, these connectors come in various configurations like front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With 9 shell sizes and 52 insert arrangements available, they accommodate M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. Constructed with high-strength aluminum shells and offering plating options like light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, these connectors meet stringent military specifications. Additionally, RoHS compliant cadmium-free finishes are also offered, ensuring environmental responsibility.