MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in applications. With nine shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts for reliable connectivity. Constructed with aluminum shells and offering a range of plating options, including RoHS compliant finishes, they ensure durability and compliance with environmental standards. Ideal for military and aerospace applications, these connectors provide secure and high-performance electrical connections in demanding conditions.