The MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Offering various mounting options such as front wall mount, rear wall mount, jam nut, and box mount receptacles, they ensure versatile connectivity. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with aluminum shells and offering plating options including cadmium and nickel, they provide durability and reliability. With a bayonet coupling mechanism and gold-plated contacts, they guarantee secure and high-performance connections. Suitable for military and industrial applications, these connectors meet stringent MIL-DTL-38999 II specifications.