The MIL-DTL-38999 Series II connectors are designed for rugged environments, with up to 128 contacts housed in an insert for secure connectivity. Operating reliably in extreme temperatures ranging 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 for easy installation. Constructed with aluminum shells and offering multiple plating options such as cadmium and electroless nickel, these connectors ensure durability and performance. Meeting military specifications, they are ideal for applications requiring high reliability and environmental resistance.