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. Offering front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs, they cater to diverse installation needs. Available in 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts in various sizes. Constructed with high strength aluminum shells, they come with multiple plating options, including cadmium-free finishes for RoHS compliance. Suitable for military and industrial applications, these circular connectors ensure reliable performance in demanding environments.