The MIL-DTL-38999 Series I connectors offer robust connectivity solutions for harsh environments, featuring up to 128 contacts within an insert. Designed for durability, these circular receptacles come in various mount types including front wall, rear wall, and jam nut options. With a wide operating temperature range of -65°C to 200°C, they ensure reliable performance in extreme conditions. Utilizing M39029 rear release crimp contacts, these connectors are available in 9 shell sizes and 52 insert arrangements, accommodating diverse application needs. Constructed with high-strength aluminum shells and offering multiple plating options such as gold and electroless nickel, they guarantee both mechanical resilience and excellent conductivity. Meeting MIL-DTL-38999 I military specifications, these connectors are ideal for demanding environments where ruggedness and performance are paramount.