The MIL-DTL-38999 Series I connectors feature up to 128 contacts within an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. 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 bayonet coupling design, they ensure secure connections in demanding applications, meeting stringent military specifications for durability and reliability. Perfect for back panel wall mounting, these receptacles are essential components for electrical systems requiring rugged, high-performance connectivity.