MIL-DTL-38999 Series I connectors offer high-performance connectivity for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, these connectors are suitable for demanding applications. Available in various styles including front wall mount, rear wall mount, and jam nut receptacles, they ensure versatility in installation. The connectors meet military specification MIL-DTL-38999 I and come in 9 different shell sizes with 52 insert arrangements. Utilizing M39029 rear release crimp contacts, they provide reliable connections in sizes 22D, 22M, 22, 20, 16, and 8 (including coax and twinax). Crafted from high-strength aluminum, they offer durability in rugged environments. Various plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum cater to specific needs. RoHS certified cadmium-free finishes are also available, ensuring compliance with environmental regulations. These connectors, with a straight plug shell style and contact gender Female, are designed for optimal performance in demanding environments, with conductivity and environmental resistance guaranteed.