MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With 52 insert arrangements available, they accommodate M39029 rear release crimp contacts in various sizes, ensuring reliable connections. Crafted from high-strength aluminum, these connectors come in multiple plating options, including cadmium-free finishes for RoHS compliance. Operating efficiently in temperatures ranging from -65°C to 200°C, they provide durable and conductive solutions for a wide range of applications.