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 come in various mounting styles, including front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. With aluminum shells and plating options like light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, these connectors ensure durability and performance. Suitable for military and industrial applications, they offer reliable connectivity with gold-plated contacts, bayonet coupling, and RoHS compliant finishes.