The 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 are suitable for demanding applications. Available in various shell sizes and insert arrangements, they use M39029 rear release crimp contacts for secure connections. The connectors come in high-strength aluminum shells with options for different plating finishes, including cadmium-free options. Offering front wall mount, rear wall mount, and jam nut receptacles, they provide flexibility in installation. With their Bayonet coupling and military-grade construction, these connectors ensure reliable performance in rugged conditions.