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 configurations including front wall mount, rear wall mount, and jam nut receptacles, these connectors offer RFI grounding plugs for added versatility. Compliant with military specification MIL-DTL-38999 I, they come in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts. Constructed with high-strength aluminum shells, they offer a range of plating options including cadmium-free finishes, such as electroless nickel. With a bayonet coupling and removable crimp contacts, these connectors ensure reliable connectivity in demanding applications.