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 including front and rear wall mount, and jam nut receptacles, they offer RFI grounding plugs for added versatility. Compliant with military specification MIL-DTL-38999 I, these circular receptacles come in 9 shell sizes and 52 insert arrangements, accommodating M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they offer plating options such as cadmium and nickel, with RoHS-certified finishes available. Suitable for demanding applications, these connectors ensure reliable performance in rugged conditions.