MIL-DTL-38999 Series I connectors offer high performance in harsh environments with up to 128 contacts in an insert. These circular connectors are designed for military specifications, featuring front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. With 52 insert arrangements available, they use M39029 rear release crimp contacts for secure connections. Operating in a wide temperature range from -65 °C to 200 °C, these connectors are ideal for demanding applications. Constructed with high strength aluminum shells and various plating options, including cadmium-free finishes, they ensure durability and reliability. Perfect for aerospace, defense, and industrial sectors, these connectors provide exceptional conductivity and resistance to environmental elements. RoHS compliant options are also available for environmentally conscious applications.