MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in a durable insert. Designed for harsh environments, these connectors are environmentally sealed and capable of operating in temperatures ranging from -65 °C to 200 °C. Featuring various mounting options such as front wall mount, rear wall mount, and jam nut receptacles, they ensure versatile installation. The connector family includes 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts in multiple sizes. Constructed with high-strength aluminum shells, they are available in different plating options, including cadmium-free finishes for RoHS compliance. With a bayonet coupling mechanism and gold-plated contact pins, these connectors guarantee reliable performance in demanding applications.