MIL-DTL-38999 Series I connectors offer rugged performance with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, they feature front and rear wall mount options, as well as jam nut receptacles with RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts for reliable connections. With a wide range of plating options, including cadmium-free finishes, they ensure durability in various operating conditions. The high strength aluminum shells provide robust protection, while gold-plated contacts guarantee optimal conductivity. Meeting MIL-DTL-38999 I military specifications, these circular receptacles are ideal for applications requiring secure and efficient electrical connections.