MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed 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 versatile mounting options including front and rear wall mount as well as jam nut receptacles. These connectors use M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, with options for RoHS certified cadmium-free finishes. Constructed with high-strength aluminum shells, they come with plating choices such as gold, electroless nickel, and more. The connector family is MIL-DTL-38999 I compliant, ensuring reliable performance with features like bayonet coupling, removable crimp contacts, and socket contact style, making them suitable for demanding applications.