The MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in a durable insert. Designed for harsh environments, they feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With a wide operating temperature range from -65°C to 200°C, these connectors ensure reliable performance in extreme conditions. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Crafted from high-strength aluminum with various plating options, including cadmium-free finishes, these connectors meet stringent military specifications for conductivity and durability. Suitable for applications requiring environment-resistant box and through bulkhead mounting receptacles, the MIL-DTL-38999 Series I connectors are essential components in demanding environments.