The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert for robust connectivity. With environmental sealing and a wide operating temperature range of -65°C to 200°C, these connectors ensure reliable performance in demanding conditions. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. The connectors come in aluminum shells with plating options such as electroless nickel and cadmium finishes, meeting RoHS compliance standards. Utilizing M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12, they provide secure connections with 500 mating cycles. Ideal for military and industrial applications, these connectors offer durability and conductivity in critical operations.