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 a wide operating temperature range of -65 °C to 200 °C, they ensure reliable performance in extreme conditions. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. The connectors come in durable high-strength aluminum shells, with various plating options including cadmium-free finishes for RoHS compliance. Perfect for military and industrial applications, these connectors deliver superior conductivity and ingress protection for demanding environments.