The MIL-DTL-38999 Series II connectors are designed for harsh environments, offering reliable connectivity with up to 128 contacts housed in an insert. These circular connectors feature various mounting options such as front wall mount, rear wall mount, jam nut, rear box mount, and front box mount receptacles. With a wide operating temperature range of -65 °C to 200 °C, they are suitable for demanding applications. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for secure connections. Crafted from aluminum, they come with plating options like electroless nickel for enhanced durability. With RoHS compliant finishes, they ensure environmental compatibility while providing excellent performance in military and industrial settings.