MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts, sealed for environmental protection. Operating in extreme temperatures from -65 °C to 200 °C, these connectors feature various mounting options, including front and rear wall mount, jam nut, and box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with aluminum shells and offering plating options like electroless nickel, they ensure reliable conductivity in demanding environments. The connectors, compliant with MIL-DTL-38999 II specifications, suit military and industrial applications requiring ruggedized, high-temperature resistant connectivity.