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 such as 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 secure connections. Constructed with aluminum shells and offering plating options like electroless nickel and cadmium finishes, these connectors ensure durability and reliability. With a wide operating temperature range of -65 °C to 200 °C, they are suitable for demanding applications in military and industrial settings. RoHS compliant options are also available, making them ideal for environmentally conscious projects.