The MIL-DTL-38999 Series II connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature 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 utilize M39029 rear release crimp contacts for reliable connections. Constructed with durable aluminum shells and a choice of plating options, including cadmium-free finishes, these connectors ensure long-lasting performance. With a wide operating temperature range of -65 °C to 200 °C and RoHS compliance, they are ideal for military and aerospace applications requiring rugged and reliable connectivity.