The MIL-DTL-38999 Series I connectors boast a robust design with up to 128 contacts housed within an environmentally sealed insert, ensuring reliable performance in harsh conditions. Operating flawlessly in temperatures ranging from -65 °C to 200 °C, these connectors come in various configurations including front wall mount, rear wall mount, and jam nut receptacles. Featuring RFI grounding plugs, they offer enhanced signal integrity. With 9 shell sizes and 52 insert arrangements, they accommodate M39029 rear release crimp contacts, making them versatile for a wide range of applications. Crafted from high-strength aluminum, they are available in different plating options, including cadmium-free finishes for RoHS compliance. Ideal for military and industrial use, these connectors guarantee durability and conductivity, with a mating life of 500 cycles.