MIL-DTL-38999 Series II connectors feature up to 128 environmentally sealed contacts, with an operating temperature range of -65 °C to 200 °C. Offering versatility in design, these connectors include 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 reliable connectivity. Constructed with aluminum shells and offering multiple plating options including cadmium-free finishes, these connectors are ideal for harsh environments. The MS27497 model specifically, a back panel wall mounting receptacle with a crimp type, bayonet coupling, and gold contact plating, is designed for military specifications, ensuring durability and performance in demanding applications.