The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts housed in an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, these connectors offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with high-strength aluminum shells and offered in different plating options, including cadmium-free finishes, these connectors ensure durability and compliance with RoHS regulations. Suitable for military and industrial applications, they come in wall-mounting flange, rear wall mount, and jam nut receptacle configurations. The bayonet coupling mechanism facilitates easy and secure mating, while the gold-plated contacts ensure excellent conductivity. Meeting MIL-DTL-38999 I specifications, these connectors guarantee reliable electrical connections in demanding settings.