MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for rugged applications with an operating temperature range of -65 °C to 200 °C. This connector family offers front wall mount, rear wall mount, and jam nut receptacles, with RFI grounding plugs for added versatility. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they come in various plating options including light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. RoHS certified finishes are also available, ensuring compliance with environmental regulations. Ideal for military and industrial use, these connectors provide reliable performance in harsh environments.