The MIL-DTL-38999 Series I connectors offer robust connectivity solutions for harsh environments, featuring front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. With up to 128 contacts, these connectors are sealed for environmental protection and can withstand temperatures ranging from -65 °C to 200 °C. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells, these connectors come in a range of plating options including cadmium-free finishes. Designed for military specifications, they ensure reliable performance with gold-plated removable crimp contacts. Suitable for box mounting applications, they offer a service rating of I and are compliant with RoHS regulations, making them ideal for demanding industrial and military environments.