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 and rear wall mount options, along with jam nut receptacles, all meeting military specification standards. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for reliable connections. Constructed with durable aluminum shells, they come with various plating options, including cadmium-free finishes for RoHS compliance. With a wide operating temperature range from -65 °C to 200 °C, these connectors ensure reliable performance in demanding applications.