MIL-DTL-38999 Series I connectors offer reliable performance in harsh environments with up to 128 contacts housed in an insert. These circular receptacles, available in various shell sizes, feature front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. Operating at temperatures ranging from -65 °C to 200 °C, they are designed for durability. Utilizing M39029 rear release crimp contacts, they ensure secure connections in aerospace and military applications. With a choice of plating options, including cadmium-free finishes, they meet RoHS compliance. These connectors, constructed with high-strength aluminum shells, are ideal for demanding environments requiring excellent conductivity and protection against ingress.