MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, these connectors offer reliability in extreme conditions. Available in various shell sizes and insert arrangements, they use M39029 rear release crimp contacts for secure connections. The high-strength aluminum shells come in different plating options, including cadmium-free finishes. Offering front wall mount, rear wall mount, and jam nut receptacles, these connectors provide flexibility for diverse applications. With gold contact plating and a mating type of bayonet, they ensure efficient signal transmission. RoHS compliant options are also available for environmentally conscious applications.