The MIL-DTL-38999 Series I connectors, designed for harsh environments, feature up to 128 contacts in an insert with a wide operating temperature range of -65 °C to 200 °C. Available in various configurations including front and rear wall mount and jam nut receptacles, they offer reliable RFI grounding. With 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in different sizes, ensuring versatility. Constructed with high-strength aluminum shells and various plating options such as cadmium and nickel, they guarantee durability. RoHS compliant options are also available. Suitable for military and industrial applications, these connectors provide secure electrical connections in demanding environments.