MIL-DTL-38999 Series II connectors are rugged and reliable, featuring up to 128 contacts in an insert for versatile connectivity. Designed to withstand harsh environments, these connectors are environmentally sealed and can operate in temperatures ranging from -65 °C to 200 °C. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, they offer flexibility for different applications. The connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with aluminum shells and offering multiple plating options, including cadmium-free finishes, they meet RoHS compliance standards. With gold contact plating, these connectors ensure efficient and durable electrical connections. Suitable for military and industrial use, they provide reliable performance in demanding conditions.