MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, offering environmental sealing and a wide operating temperature range from -65 °C to 200 °C. Available in various mounting options like front wall, rear wall, and jam nut receptacles, they ensure versatility in harsh environments. With 52 insert arrangements and M39029 rear release crimp contacts in multiple sizes, including coax and twinax, these connectors provide reliable connectivity. Crafted from high-strength aluminum shells with plating options like electroless nickel and cadmium finishes, they meet stringent military specifications. RoHS certified variations further enhance their environmental compliance, making them ideal for demanding applications in aerospace, defense, and industrial sectors.