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 and rear wall mount options, along with jam nut receptacles and RFI grounding plugs. With a wide operating temperature range of -65 °C to 200 °C, they provide reliable functionality in extreme conditions. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for secure connections. Constructed with high strength aluminum shells and various plating options such as gold, electroless nickel, and cadmium-free finishes, they ensure durability and compatibility. Suitable for military and industrial applications, MIL-DTL-38999 Series I connectors meet stringent performance standards for reliable signal transmission.