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 range of shell sizes and insert arrangements, they accommodate various contact types, including M39029 rear release crimp contacts. Constructed with durable aluminum shells and available in different plating options, such as electroless nickel and iridescent yellow cadmium, these connectors ensure reliable performance in extreme conditions. RoHS compliant finishes are also available, making them suitable for diverse applications that demand ruggedness and durability.