The MIL-DTL-38999 Series II connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These connectors are front wall mount, rear wall mount, jam nut, rear box mount, and front box mount (long grommet) receptacles. With a wide operating temperature range of -65 °C to 200 °C, they are suitable for various applications. Constructed with aluminum shells and offering multiple plating options including cadmium-free finishes, they ensure durability and reliability. Utilizing M39029 rear release crimp contacts, they come in 9 shell sizes and 52 insert arrangements. The connectors are ideal for military and industrial use, meeting stringent MIL-DTL-38999 II specifications.