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. This connector family includes front and rear wall mount as well as jam nut receptacles, with options for RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells, these connectors offer plating options such as cadmium and nickel, with RoHS compliant finishes. Ideal for military and industrial use, they provide reliable connectivity in harsh environments.