The MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature various mounting options including front and rear wall mount as well as jam nut receptacles. With a wide operating temperature range of -65 °C to 200 °C, they are suitable for diverse applications. Utilizing M39029 rear release crimp contacts, these connectors ensure reliable connections in sizes 22D, 22M, 22, 20, 16, and 8. Crafted from high-strength aluminum, they come in nine shell sizes and 52 insert arrangements. Plating options include cadmium-free finishes such as electroless nickel, offering enhanced durability. Meeting MIL-DTL-38999 I specifications, these connectors are ideal for military and industrial use, providing efficient and secure electrical connections in demanding environments.