The MIL-DTL-38999 Series I connectors boast a rugged design suitable for harsh environments, with up to 128 contacts housed in an insert for efficient connectivity. These connectors are fully environmentally sealed, ensuring reliable performance in extreme conditions ranging from -65 °C to 200 °C. Featuring various mounting options such as front wall mount, rear wall mount, and jam nut receptacles, they offer versatility in installation. Compliant with military specification MIL-DTL-38999 I, these circular connectors come in 9 shell sizes and 52 insert arrangements, accommodating a wide range of applications. Utilizing M39029 rear release crimp contacts in different sizes, they provide secure and efficient connections. With high-strength aluminum shells and a choice of plating options including cadmium and nickel finishes, they guarantee durability and corrosion resistance. The RoHS compliant models ensure environmental responsibility in their construction. Suitable for demanding service environments, these connectors are ideal for aerospace, defense, and industrial applications.