MIL-DTL-38999 Series II connectors, designed for harsh environments, feature up to 128 contacts in an insert and are sealed for environmental protection. With an operating temperature range of -65 °C to 200 °C, these connectors come in 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 use M39029 rear release crimp contacts. Constructed with aluminum shells, they offer plating options such as cadmium and nickel. RoHS compliant finishes are also available. Suitable for military and industrial applications, these connectors ensure reliable performance in demanding conditions.