MIL-DTL-38999 Series I connectors feature up to 128 contacts housed in an insert, offering robust environmental sealing and a wide operating temperature range of -65°C to 200°C. This connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, providing versatile connectivity options. With 9 shell sizes and 52 insert arrangements available, they utilize M39029 rear release crimp contacts in various sizes, ensuring reliable connections. Constructed with high-strength aluminum shells, these connectors come with multiple plating options, including cadmium-free finishes, meeting RoHS compliance. Suitable for harsh environments, they are ideal for applications requiring secure and durable electrical connections.