MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various shell sizes and insert arrangements, they offer versatility in applications. The connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Utilizing M39029 rear release crimp contacts, these connectors ensure secure and reliable connections. Constructed with high-strength aluminum shells, they come in different plating options such as cadmium and nickel, meeting RoHS compliance standards. Perfect for military and industrial use, these circular plugs offer durability and conductivity, with a mating life of 500 cycles.