MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, offering environmental sealing and a wide operating temperature range from -65°C to 200°C. This harsh environment connector family includes front wall mount, rear wall mount, and jam nut receptacles, as well as RFI grounding plugs. With 9 shell sizes and 52 insert arrangements available, they utilize M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8 for coax and twinax configurations. Constructed with high-strength aluminum shells, these connectors come with a variety of plating options, including cadmium-free finishes. RoHS certified, they are suitable for demanding applications requiring reliability and durability.