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, they offer reliable performance in demanding conditions. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with options for plating, including cadmium-free finishes. Offering front wall mount, rear wall mount, and jam nut receptacles, they use M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. With a mating type of bayonet coupling and contact gender of female, they ensure secure connections. RoHS compliant options are also available, making them suitable for a wide range of applications requiring rugged and dependable connectivity.