MIL-DTL-38999 Series I connectors are designed for harsh environment applications, featuring up to 128 contacts in an insert for high-density connectivity. With a wide operating temperature range from -65 °C to 200 °C, these connectors are ideal for demanding environments. Available in various shell sizes and insert arrangements, they offer flexibility in design. The connectors come in high strength aluminum shells with multiple plating options, including cadmium-free finishes for RoHS compliance. They feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, catering to diverse installation needs. Utilizing M39029 rear release crimp contacts, these connectors ensure secure and reliable connections. Suitable for military and industrial applications, they provide rugged performance with a service rating of M and environmental resistance.