MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, with operating temperatures ranging from -65 °C to 200 °C. This harsh environment connector family offers front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts. Made of high strength aluminum, these connectors come with various plating options, including cadmium-free finishes. Ideal for military and industrial applications, they ensure reliable performance in challenging environments.