MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range from -65°C to 200°C, these connectors ensure reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, they offer versatility for different applications. Constructed with high-strength aluminum shells and offering multiple plating options, including cadmium-free finishes, these connectors meet RoHS compliance standards. The connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, all utilizing M39029 rear release crimp contacts. Perfect for military and industrial use, these connectors provide durable and secure electrical connections, with a mating type of bayonet and contact style of pin.