MIL-DTL-38999 Series I connectors are designed for harsh environments with up to 128 contacts in an insert. Featuring front wall mount, rear wall mount, and jam nut receptacles, they offer RFI grounding plugs for secure connections. With an operating temperature range of -65 °C to 200 °C, these connectors are ideal for demanding applications. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for reliable performance. Constructed with high-strength aluminum shells and various plating options including cadmium-free finishes, these connectors ensure durability and compliance with RoHS regulations. Suitable for military and industrial use, they provide environment-resistant connectivity for critical systems.