MIL-DTL-38999 Series I connectors offer high performance in harsh environments, with up to 128 contacts housed in a sealed insert. Operating reliably between -65 °C and 200 °C, they feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts in various sizes, including coax and twinax. Constructed with durable high-strength aluminum shells, they come with plating options such as cadmium and nickel coatings. RoHS compliant finishes are also available, catering to diverse industrial needs. With a straight plug configuration and gold contact plating, they ensure reliable connectivity even in demanding applications. Perfect for military and industrial use, these connectors are designed for longevity, with a mating life of 500 cycles and robust environmental resistance.