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. This connector family offers front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in various sizes, including coax and twinax. Constructed with high strength aluminum shells and offered in different plating options such as cadmium and nickel, these connectors ensure durability and reliability in demanding applications. RoHS compliant finishes are also available, catering to diverse environmental requirements. Perfect for military-grade applications, these connectors provide secure and efficient electrical connections, with a mating life of 1500 cycles and reliable conductivity.