The MIL-DTL-38999 Series II connectors offer robust connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, they feature various mounting options including front and rear wall mount, jam nut, and box mount receptacles. With a wide operating temperature range of -65°C to 200°C, these connectors ensure reliable performance in extreme conditions. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering multiple plating options, including RoHS certified finishes, these connectors are ideal for military and aerospace applications requiring durability and high performance.