MIL-DTL-38999 Series II connectors feature up to 128 contacts within an environmentally sealed insert, designed for rugged applications with an operating temperature range of -65 °C to 200 °C. These connectors offer 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 utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with durable aluminum shells, they come with plating options such as cadmium or nickel finishes, meeting RoHS compliance standards. Ideal for military and industrial use, these connectors ensure reliable performance in harsh environments.