MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for rugged applications with an operating temperature range of -65 °C to 200 °C. Available in various mounting styles, including front and rear wall mount and jam nut receptacles, these connectors offer reliable RFI grounding. With 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for secure connections. Constructed with high-strength aluminum shells, they come with plating options such as cadmium and nickel for enhanced durability. Certified for RoHS compliance, these connectors are ideal for military and industrial use.