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 and rear wall mount, as well as jam nut receptacles with RFI grounding plugs, providing versatility for various applications. With 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts, ensuring reliable connections. Constructed with high-strength aluminum shells, these connectors are available in different plating options, including cadmium-free finishes, meeting RoHS certification standards. Suitable for military and industrial use, they guarantee durability and performance in demanding environments.