MIL-DTL-38999 Series II connectors, designed for harsh environments, feature up to 128 contacts in an insert and offer a wide range of mounting options including front and rear wall mount, jam nut, and box mount receptacles. With a rugged construction and operating temperature range of -65°C to 200°C, these connectors are ideal for military and industrial applications. They come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts, and are available in aluminum shells with various plating options including cadmium and electroless nickel. RoHS compliant finishes are also available. Meeting stringent military specifications, these connectors provide reliable performance in demanding conditions.