The MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts in an insert, designed for harsh environments. Featuring front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they provide versatile options for various applications. With a wide operating temperature range from -65°C to 200°C, these connectors ensure reliable performance in extreme conditions. Constructed with high-strength aluminum shells and available in multiple plating options including cadmium-free finishes, they meet stringent military specifications for durability and longevity. The use of M39029 rear release crimp contacts in various sizes guarantees secure and efficient connections. Suitable for demanding environments, these circular connectors are ideal for aerospace, defense, and industrial applications.