MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With a wide operating temperature range of -65 °C to 200 °C, they offer reliability in extreme conditions. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, these connectors ensure versatility in application. The connectors, in 9 shell sizes and 52 insert arrangements, use M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering plating options like cadmium and electroless nickel, they guarantee durability. Meeting military specification MIL-DTL-38999 II, these connectors are ideal for demanding environments requiring high-performance electrical connectivity.