MIL-DTL-38999 Series II connectors are designed for demanding environments, with up to 128 contacts sealed for protection. Operating between -65 °C and 200 °C, these connectors offer reliability in extreme conditions. Featuring various mounting options like front wall, rear wall, and jam nut receptacles, they cater to diverse needs. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts. Constructed with aluminum shells and plating options including cadmium-free finishes, they meet RoHS compliance. With gold plating, these connectors ensure excellent conductivity and mating life, making them ideal for military and industrial applications requiring rugged performance.