The MIL-DTL-38999 Series I connectors offer a robust solution for harsh environments, featuring up to 128 contacts in an insert. Designed for durability, these connectors are environmentally sealed and can operate in extreme temperatures ranging from -65 °C to 200 °C. Available in various configurations including front wall mount, rear wall mount, and jam nut receptacles, they are ideal for military and aerospace applications. With nine shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in different sizes. Constructed with high-strength aluminum shells, they come in a range of plating options such as cadmium and electroless nickel. The connectors are RoHS compliant, ensuring environmental sustainability. Perfect for critical connectivity needs, they provide reliable performance with features like bayonet coupling and gold contact plating.