The MIL-DTL-38999 Series I connectors offer robust connectivity solutions for harsh environments, featuring up to 128 contacts sealed within their inserts. Designed for durability, these connectors operate flawlessly in temperatures ranging from -65°C to 200°C. Available in front wall mount, rear wall mount, and jam nut receptacles, they ensure secure installations. With 9 shell sizes and 52 insert arrangements, they accommodate various configurations using M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they come in a range of plating options, including cadmium-free finishes for RoHS compliance. These connectors are ideal for military and aerospace applications, providing reliable performance in demanding conditions.