MIL-DTL-38999 Series I connectors feature up to 128 environmentally sealed contacts in an insert, designed for harsh environments with an operating temperature range from -65 °C to 200 °C. This connector family includes front and rear wall mount as well as jam nut receptacles, along with 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, they offer a range of plating options, including cadmium-free finishes. Ideal for military and industrial applications, these connectors ensure reliable performance with a contact mating life of 500 cycles.