The 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 configurations including front wall mount, rear wall mount, and jam nut receptacles, these connectors offer versatility in connectivity solutions. Utilizing M39029 rear release crimp contacts, they ensure secure connections in sizes 22D, 22M, 22, 20, 16, and 8 (coax and twinax). Constructed with high strength aluminum shells, they come with multiple plating options such as electroless nickel and cadmium finishes, including RoHS certified cadmium-free variants. With a mating type of bayonet coupling and contact plating of gold, these connectors guarantee reliable performance in demanding applications.