MIL-DTL-38999 Series I connectors feature up to 128 contacts within an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting options like front wall mount, rear wall mount, and jam nut receptacles, they offer RFI grounding plugs for added versatility. With 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts, including sizes 22D, 22M, 22, 20, 16, and 8 for coax and twinax applications. Constructed with high-strength aluminum shells and offering multiple plating options such as cadmium and nickel, they ensure durability and reliability. RoHS compliant finishes are also available, catering to diverse environmental requirements. Perfect for military and industrial applications, these connectors provide secure and efficient electrical connections in demanding conditions.