MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts, sealed for environmental durability. Designed for harsh environments, they feature front and rear wall mount options, as well as jam nut receptacles and RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in various sizes, including coax and twinax. With a wide range of plating options, such as gold and electroless nickel, they ensure reliable performance in temperatures ranging from -65 °C to 200 °C. Constructed with high-strength aluminum shells, these connectors meet stringent military specifications for quality and durability.