The MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an environmentally sealed insert. With a wide operating temperature range of -65 °C to 200 °C, these connectors are suitable for demanding applications. Available in various shell sizes and insert arrangements, they offer versatility for different connection needs. Constructed with high-strength aluminum shells and offering multiple plating options, including RoHS certified finishes, these connectors ensure reliability and durability. The connectors come in receptacle types for front and rear wall mounting, as well as jam nut receptacles and RFI grounding plugs, catering to diverse installation requirements. Utilizing M39029 rear release crimp contacts, they provide secure connections in sizes 22D, 22M, 22, 20, 16, and 8. Whether in military or industrial settings, the MIL-DTL-38999 Series I connectors deliver efficient performance, with gold plated contacts, bayonet coupling, and a service rating of I for rugged use.