MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert with environmental sealing. Operating between -65°C and 200°C, they offer durability in extreme conditions. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with different plating options, including cadmium-free finishes. With front and rear wall mount options, as well as jam nut receptacles and RFI grounding plugs, they provide versatile connectivity solutions. Utilizing M39029 rear release crimp contacts, these connectors ensure reliable performance, making them ideal for military and aerospace applications.