MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in a sealed insert. Designed for harsh environments, these connectors feature front and rear wall mount options, as well as jam nut receptacles and RFI grounding plugs. With 52 insert arrangements and M39029 rear release crimp contacts, they provide versatility in applications. The connectors, made of high-strength aluminum, come in various plating options, including cadmium-free finishes for RoHS compliance. Operating between -65 °C and 200 °C, they ensure reliable performance in extreme conditions. Suitable for military and industrial uses, these connectors guarantee durability and conductivity, with a robust construction and a mating life of 500 cycles.