MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various configurations including front wall mount, rear wall mount, and jam nut receptacles, they offer RFI grounding plugs for added protection. Comprising 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in multiple sizes. Constructed with high-strength aluminum shells, they come with a range of plating options such as cadmium and nickel, including RoHS compliant finishes. Ideal for military and industrial applications, these connectors provide reliable performance with their conductive pin contact style and environment-resistant design.