MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. These thin-walled, restricted-length 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 aluminum shells and offering plating options such as electroless nickel, they meet RoHS compliance standards. Ideal for military and industrial applications, these connectors ensure reliable performance in demanding conditions.