The MIL-DTL-38999 Series I connectors offer robust performance in harsh environments with up to 128 contacts contained in an insert. These environmentally sealed connectors have a wide operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Constructed with high-strength aluminum shells, they come in a range of plating options, including cadmium-free finishes. Utilizing M39029 rear release crimp contacts, these connectors ensure reliable connectivity with gold-plated contact surfaces. Their bayonet coupling and straight plug design make them suitable for military applications, providing excellent conductivity and resistance to environmental factors.