MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting options like front wall, rear wall, and jam nut receptacles, they ensure secure connections. With 9 shell sizes and 52 insert arrangements, these connectors accommodate M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8, including coax and twinax variants. Constructed with high-strength aluminum shells and offered in multiple plating options like cadmium and nickel, they guarantee durability and conductivity. RoHS compliant finishes are also available, catering to environmental regulations. Suitable for military and industrial applications, the MIL-DTL-38999 I connectors deliver reliable performance in demanding conditions.