MIL-DTL-38999 Series I connectors feature up to 128 contacts sealed for harsh environments, with a wide operating temperature range from -65 °C to 200 °C. Available in various mounting styles including front and rear wall mount, as well as jam nut receptacles, they offer RFI grounding plugs for added versatility. With 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. Constructed with high-strength aluminum shells and offering plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, they provide reliable performance in demanding applications. RoHS certified finishes are also available, ensuring compliance with environmental standards.