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. Offering front wall mount, rear wall mount, and jam nut receptacles, this connector family includes RFI grounding plugs and M39029 rear release crimp contacts in various sizes. Available in 9 shell sizes and 52 insert arrangements, they come in high-strength aluminum shells with plating options such as cadmium and electroless nickel. RoHS compliant versions are also offered, ensuring performance and reliability for demanding applications.