MIL-DTL-38999 Series II connectors are designed for harsh environments, offering up to 128 contacts in a single 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 ensure reliability in extreme conditions. Available in 9 shell sizes and 52 insert arrangements, they feature M39029 rear release crimp contacts. The connectors, made of aluminum, come with various plating options including cadmium-free finishes, making them RoHS compliant. These connectors, ideal for military and industrial applications, provide secure and efficient electrical connections with their EMI/RFI shielding and durable construction.