MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert with environmental sealing. With an operating temperature range of -65 °C to 200 °C, they offer reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, these connectors come in high-strength aluminum shells with options for different plating finishes, including RoHS-certified alternatives. The connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, catering to diverse application needs. Utilizing M39029 rear release crimp contacts, they ensure secure and durable connections, with options for different contact sizes and types. Ideal for military and industrial use, these connectors are known for their rugged construction and high reliability, making them suitable for demanding environments requiring conductivity and environmental resistance.