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 multiple shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with various plating options, including RoHS-certified finishes. Offering front wall mount, rear wall mount, and jam nut receptacles, they use M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, suitable for diverse applications. The bayonet coupling design ensures secure mating, while the electroless nickel finish provides conductivity and resistance. Ideal for military and industrial use, these connectors meet MIL-DTL-38999 I specifications for reliable performance in demanding conditions.