MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts 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 offering multiple plating options, including RoHS certified finishes, these connectors ensure durability and compliance. Suitable for wall mounting with options for front and rear wall mount receptacles, as well as jam nut receptacles, they provide versatility for different applications. The bayonet coupling mechanism guarantees quick and secure mating, making them ideal for military and industrial use.