MIL-DTL-38999 Series I connectors offer high-performance connectivity with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With 9 shell sizes and 52 insert arrangements available, they utilize M39029 rear release crimp contacts for secure connections. Constructed with durable aluminum shells and various plating options, including cadmium-free finishes, these connectors ensure reliability in a wide range of applications. Operating efficiently in temperatures ranging from -65 °C to 200 °C, they are ideal for military and industrial use.