MIL-DTL-38999 Series I connectors feature up to 128 contacts enclosed in an environmentally sealed insert, designed for rugged applications with an operating temperature range of -65°C to 200°C. This connector family includes front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells, these connectors offer a choice of plating options, including cadmium-free finishes. Ideal for military and harsh environment use, they are reliable with a mating life of 500 cycles.