The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These connectors are environmentally sealed and operate in temperatures ranging from -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they utilize rear release crimp contacts and come in high-strength aluminum shells. Offering front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they cater to diverse connectivity needs. Plating options include cadmium finishes and RoHS-certified alternatives, ensuring compliance with environmental regulations. With gold-plated contacts for optimal conductivity and a bayonet coupling mechanism for easy mating, these connectors are ideal for military and industrial applications requiring rugged and reliable performance.