The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts within an insert and offering front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. With an operating temperature range of -65°C to 200°C, these connectors are environmentally sealed for reliable performance. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells and offered in multiple plating options, including cadmium-free finishes, these connectors ensure durability and versatility. Meeting military specification MIL-DTL-38999 I, they are ideal for demanding applications requiring secure and efficient electrical connections.