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. This connector family includes front wall mount, rear wall mount, and jam nut receptacles, with RFI grounding plugs available. Offered in 9 shell sizes and 52 insert arrangements, utilizing M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells and available in multiple plating options, including RoHS certified finishes. Suitable for military and industrial applications requiring reliable connectivity in challenging conditions.