The MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in a single insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors are suitable for various applications. They feature front and rear wall mount options, as well as 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. The connectors are constructed with aluminum shells and come with various plating options, including cadmium-free finishes for RoHS compliance. With a durable design and dependable performance, these connectors are ideal for military and industrial use.