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, as well as jam nut and box mount receptacles. Available in 9 shell sizes with 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connections. The aluminum shells come in a range of plating options, including cadmium-free finishes, ensuring durability. With a wide operating temperature range from -65°C to 200°C, these connectors are suitable for demanding applications in military and industrial settings.