MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in an environmentally sealed insert. With a wide operating temperature range of -65 °C to 200 °C, they are suitable for demanding applications. Featuring various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, these connectors provide versatility. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable connections. Made of aluminum with plating options including cadmium-free finishes, they meet RoHS compliance standards. Ideal for military and industrial use, these connectors ensure durability and performance in rugged conditions.