MIL-DTL-38999 Series I 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. Available in various mounting options including front and rear wall mount, as well as jam nut receptacles, they ensure secure connections in demanding conditions. With 52 insert arrangements and M39029 rear release crimp contacts, they offer versatility in applications. Constructed with high-strength aluminum shells and offering a range of plating options, including RoHS certified finishes, these connectors guarantee reliable performance. The Electroless Nickel finish provides durability and conductivity, making them suitable for a wide range of industrial and military applications.