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 mounting options like front and rear wall mount, they offer reliable connectivity with RFI grounding plugs. These circular connectors come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they are offered in a range of plating options including cadmium-free finishes. Ideal for military and aerospace applications, these connectors ensure durability and performance in demanding conditions.