MIL-DTL-38999 Series I connectors boast exceptional durability and versatility, featuring up to 128 contacts within a sealed insert. Designed for harsh environments, these connectors operate reliably in temperatures ranging from -65°C to 200°C. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts in multiple sizes, including coax and twinax. Constructed with high-strength aluminum shells, they offer a range of plating options such as cadmium and electroless nickel. With a bayonet coupling system and back panel box mounting flange, these connectors ensure secure and efficient electrical connections, making them ideal for military and industrial applications.