MIL-DTL-38999 Series I connectors feature up to 128 contacts in 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, they offer versatility in applications. These connectors come in high-strength aluminum shells with plating options including cadmium finishes and RoHS-certified alternatives. The connector types include front and rear wall mount, jam nut receptacles, and RFI grounding plugs, with contact options for M39029 rear release crimp contacts. Perfect for military and industrial use, these connectors ensure reliable performance with their gold-plated removable crimp contacts and bayonet coupling. Suitable for straight plug mounting, they are built for durability, conductivity, and environmental resistance, making them ideal for demanding operating conditions.