MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they provide flexibility for different applications. The connectors come in aluminum shells with options for plating such as cadmium and nickel, meeting RoHS compliance standards. Utilizing M39029 rear release crimp contacts, they ensure secure connections with sizes ranging from 22D to 12. Perfect for military and industrial use, these connectors guarantee durability and conductivity with a mating life of 500 cycles.