The MIL-DTL-38999 Series I connectors feature a rugged design with up to 128 contacts, suitable for harsh environments with an operating temperature range of -65°C to 200°C. Available in various shell sizes and insert arrangements, they offer versatility in applications. These connectors come in a durable aluminum shell with options for plating, including cadmium-free finishes. With front wall mount, rear wall mount, and jam nut receptacles, and RFI grounding plugs, they ensure reliable connectivity. Utilizing M39029 rear release crimp contacts, they guarantee secure connections. Meeting military specification MIL-DTL-38999 I, these circular receptacles are designed for demanding service class T environments, providing 500 mating cycles and excellent conductivity. The RoHS compliant options further enhance their appeal, making them ideal for a wide range of industrial and military applications.