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 and rear wall mount receptacles, as well as jam nut receptacles with RFI grounding plugs. With a wide operating temperature range from -65°C to 200°C, they ensure reliable performance in extreme conditions. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for secure connections. The high strength aluminum shells come in various plating options, including cadmium-free finishes for RoHS compliance. Ideal for military and industrial applications, these connectors provide durable and efficient solutions for critical connectivity needs.