The MIL-DTL-38999 Series II connectors offer robust connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, 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 secure connections. Constructed with durable aluminum shells and plated in options like electroless nickel and cadmium, they ensure reliable performance in temperatures ranging from -65 °C to 200 °C. Meeting stringent military specifications, these connectors are ideal for applications requiring rugged and dependable electrical connections.