MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Offering front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they provide versatility in connectivity solutions. With 9 shell sizes and 52 insert arrangements available, these connectors use M39029 rear release crimp contacts in various sizes, including coax and twinax options. Constructed with high strength aluminum shells and a range of plating options such as cadmium and nickel, they ensure durability and reliability. RoHS compliant finishes are also offered. Ideal for military and industrial applications, these connectors provide a secure and conductive connection in demanding environments.