MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed 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 of -65°C to 200°C, these connectors are suitable for demanding applications. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connections. The high strength aluminum shells come in various plating options, including cadmium-free finishes, ensuring durability and compliance with RoHS regulations. Suitable for military and industrial use, these connectors provide robust and secure electrical connections in challenging conditions.