MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range from -65 °C to 200 °C. Available in front wall mount, rear wall mount, and jam nut receptacles, they ensure RFI grounding. With 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts in various sizes. Constructed with high strength aluminum shells, they offer plating options including cadmium-free finishes. RoHS compliant, they guarantee reliability with a service rating of M, suitable for demanding applications.