MIL-DTL-38999 Series I connectors offer high-performance solutions for harsh environments, featuring a maximum of 128 contacts in an insert. Designed for durability, 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 ensure secure connections in demanding applications. With 9 shell sizes and 52 insert arrangements, these connectors accommodate diverse needs, utilizing M39029 rear release crimp contacts in various sizes. Constructed with high strength aluminum shells, they are offered in different plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. Certified for RoHS compliance, they provide reliable performance with a service rating of I, making them ideal for military and industrial use.