The MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65°C to 200°C. Available in various configurations including front and rear wall mount and jam nut receptacles, they ensure reliable RFI grounding. With 9 shell sizes and 52 insert arrangements, they accommodate M39029 rear release crimp contacts in multiple sizes. Constructed with high strength aluminum shells, these connectors offer a choice of plating options such as cadmium and nickel, meeting diverse application needs. RoHS certified finishes are also available, making them environmentally friendly choices for military and industrial settings.