The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts housed in an insert. These connectors are environmentally sealed, with an operating temperature range of -65°C to 200°C. Available in various configurations including front wall mount, rear wall mount, and jam nut receptacles, they offer versatility for different applications. Constructed with high-strength aluminum shells and utilizing M39029 rear release crimp contacts, they ensure reliable performance. Plating options such as electroless nickel and cadmium finishes cater to specific requirements. RoHS compliant versions are also available, making them suitable for a wide range of industries.