MIL-DTL-38999 Series I connectors feature up to 128 contacts enclosed in an 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, as well as jam nut receptacles, they offer RFI grounding plugs for added functionality. Compliant with military specification MIL-DTL-38999 I, these connectors come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they offer a choice of plating options such as cadmium and nickel, with RoHS certified finishes available. Suitable for demanding applications, these circular receptacles ensure reliable electrical connections in rugged settings.