The MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they offer front and rear wall mount options, as well as jam nut receptacles. These connectors utilize M39029 rear release crimp contacts, with plating options including gold, electroless nickel, and cadmium finishes. Constructed with high strength aluminum shells, they ensure reliable performance with RoHS compliant cadmium-free finishes. Suitable for military and industrial applications, these connectors provide durable and secure electrical connections, meeting stringent environmental standards.