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 shell sizes and insert arrangements, they utilize M39029 rear release crimp contacts. These connectors come in high-strength aluminum shells with options for different plating finishes, including RoHS compliant versions. With front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they offer versatility in connectivity solutions for military and industrial applications.