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 mounting options like front wall, rear wall, and jam nut receptacles with RFI grounding plugs, they offer 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, they come in plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum, including RoHS compliant finishes. Ideal for military and industrial applications, these connectors ensure reliable performance with features like gold contact plating, bayonet coupling, and a wide temperature range.