MIL-DTL-38999 Series II connectors feature up to 128 contacts enclosed in an environmentally sealed insert, designed for rugged applications. With an impressive operating temperature range of -65 °C to 200 °C, these connectors offer reliable performance in harsh environments. Available in various configurations including front and rear wall mount, jam nut, and box mount receptacles, they provide versatile connectivity options. The connectors come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with durable aluminum shells and offering multiple plating options such as electroless nickel and cadmium finishes, they ensure corrosion resistance. Ideal for military and aerospace applications, these connectors meet stringent standards for performance and durability, making them a reliable choice for demanding environments.