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 from -65°C to 200°C. Available in various mounting options including front wall, rear wall, and jam nut receptacles, they ensure secure connections in demanding applications. Compliant with military specification MIL-DTL-38999 I, these circular connectors offer reliable performance with M39029 rear release crimp contacts. The high strength aluminum shells come in multiple plating options such as electroless nickel and cadmium finishes, meeting diverse industrial needs. With RoHS certified cadmium-free variants, these connectors guarantee both performance and environmental compliance.