MIL-DTL-38999 Series II connectors offer robust performance with up to 128 contacts in an environmentally sealed insert, designed for extreme operating temperatures ranging from -65 °C to 200 °C. Featuring various mounting options including front wall, rear wall, jam nut, and box mount receptacles, these connectors ensure versatility in installation. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connectivity. Constructed with aluminum shells and offered in multiple plating options, such as cadmium and nickel, they guarantee durability in harsh environments. With a mating type of bayonet and contact gender female, they are suitable for diverse applications requiring secure and conductive connections. Meeting MIL-DTL-38999 II military specifications, these connectors provide a dependable solution for demanding environments.