MIL-DTL-38999 Series II connectors offer rugged durability in harsh environments, featuring up to 128 contacts within an insert. These environmentally sealed connectors operate reliably in temperatures ranging from -65 °C to 200 °C. Available in various mounting styles, including front and rear wall mount, jam nut, and box mount receptacles, they ensure versatile installation options. With 52 insert arrangements and M39029 rear release crimp contacts, these connectors guarantee secure and efficient connections. Constructed with aluminum shells and offering multiple plating options, such as electroless nickel and cadmium-free finishes, they meet diverse application requirements. Ideal for military and industrial use, these connectors provide reliable performance with a service rating of I and a mating life of 500 cycles.