MIL-DTL-38999 Series I connectors feature up to 128 contacts in a 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, these connectors offer front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. Constructed with high-strength aluminum shells and offering RoHS compliant plating options, including electroless nickel and cadmium finishes, they ensure reliable performance in demanding applications. Suitable for military and industrial use, these circular receptacles, specifically designed for back panel and box mounting, are equipped with removable crimp contacts and bayonet coupling. Meeting MIL-DTL-38999 I specifications, they guarantee durability with a service rating of M, conductivity, and environmental resistance for reliable connectivity in critical settings.