MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert and offering front wall mount, rear wall mount, and jam nut receptacles with RFI grounding plugs. With operating temperatures ranging from -65 °C to 200 °C, these connectors are ideal for demanding applications. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in various sizes. Constructed with high strength aluminum shells, they come in plating options such as light iridescent yellow cadmium, olive drab cadmium, electroless nickel, and black anodized aluminum. RoHS certified finishes are also available. Suitable for military and industrial use, these connectors provide reliable performance in challenging conditions.