MIL-DTL-38999 Series I connectors feature up to 128 contacts in a sealed insert, designed for harsh environments with a wide operating temperature range of -65°C to 200°C. Offering various mounting options like front and rear wall mount and jam nut receptacles, they ensure secure connections. With 52 insert arrangements and M39029 rear release crimp contacts in multiple sizes, including coax and twinax, these connectors provide versatility. Constructed with high-strength aluminum shells and available in different plating options like electroless nickel and cadmium finishes, they meet diverse industrial needs. RoHS compliant options offer environmentally friendly solutions. Perfect for military, aerospace, and industrial applications, these connectors guarantee reliable performance in demanding conditions.