MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, they feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With 9 shell sizes and 52 insert arrangements, these connectors utilize M39029 rear release crimp contacts for reliable connections. Operating between -65 °C and 200 °C, they are ideal for a wide range of applications. The connectors come in high strength aluminum shells with various plating options, including cadmium-free finishes. Meeting MIL-DTL-38999 I military specifications, they ensure durability and performance in demanding conditions.