MIL-DTL-38999 Series I connectors feature up to 128 contacts in a sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in front and rear wall mount, as well as jam nut receptacles with RFI grounding plugs, they offer versatility. Utilizing M39029 rear release crimp contacts, these connectors come in 9 shell sizes and 52 insert arrangements, including sizes 22D, 22M, 22, 20, 16, and 8. Constructed with high-strength aluminum shells and offering various plating options like cadmium and nickel, they ensure durability. RoHS certified finishes are also available, catering to environmental standards. Suitable for military applications, these connectors provide reliable performance with a mating cycle life of 500 cycles, making them ideal for demanding environments.