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 front wall mount, rear wall mount, and jam nut receptacles, this connector family offers versatility in 9 shell sizes and 52 insert arrangements. Utilizing M39029 rear release crimp contacts, it ensures reliable connectivity in sizes 22D, 22M, 22, 20, 16, and 8 (coax and twinax). Constructed with high strength aluminum shells and offered in various plating options including cadmium-free finishes, these connectors meet stringent military specifications for durability and performance. Suitable for a wide range of applications, the MIL-DTL-38999 Series I connectors are ideal for demanding environments where reliability is paramount.