The MIL-DTL-38999 Series I connectors offer reliable performance in harsh environments, featuring up to 128 contacts in an insert. With front wall mount, rear wall mount, and jam nut receptacles, they provide versatile connectivity options. These environmentally sealed connectors are designed for durability, with a wide operating temperature range of -65 °C to 200 °C. Utilizing M39029 rear release crimp contacts, they ensure secure connections in sizes 22D, 22M, 22, 20, 16, and 8. Constructed with high-strength aluminum shells and available in various plating options, including cadmium-free finishes, they meet stringent military specifications for performance and reliability. The bayonet coupling mechanism and gold-plated contact pins further enhance their functionality, making them suitable for demanding applications that require rugged and dependable electrical connections.