MIL-DTL-38999 Series I connectors are designed for demanding environments, offering up to 128 contacts in a sealed insert. With a wide operating temperature range from -65 °C to 200 °C, these connectors ensure reliable performance in extreme conditions. Available in 9 shell sizes and 52 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 with various plating options, including cadmium-free finishes. Utilizing M39029 rear release crimp contacts, these connectors are ideal for military and aerospace applications, providing durability and conductivity. With gold contact plating and a bayonet coupling design, they offer secure and efficient connections for critical systems. RoHS compliant options are also available, meeting environmental regulations.