MIL-DTL-38999 Series I connectors feature up to 128 contacts, designed for harsh environments with a wide operating temperature range of -65 °C to 200 °C. Available in various receptacle styles including front and rear wall mount, and jam nut, they offer RFI grounding plugs for added versatility. With 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts in different sizes, suitable for a range of applications. Crafted from high strength aluminum, they offer multiple plating options, including cadmium-free finishes, meeting RoHS certification. The connectors are ideal for military and aerospace applications, ensuring reliability with a service rating of I, Coax, and environmental resistance.