MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors are environmentally sealed for reliable performance. Available in various shell sizes and insert arrangements, they offer flexibility for different applications. The high-strength aluminum shells come with options for plating, including cadmium-free finishes, meeting RoHS certification. The connectors, with front wall mount, rear wall mount, and jam nut receptacles, utilize M39029 rear release crimp contacts for secure connections. Suitable for military and industrial use, these connectors ensure durability and conductivity in demanding settings.