The MIL-DTL-38999 Series I connectors offer reliable connectivity in harsh environments, featuring up to 128 contacts sealed for environmental protection. With an impressive operating temperature range of -65°C to 200°C, these connectors are designed for extreme conditions. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts for secure connections. Constructed with high-strength aluminum shells and offering multiple plating options, including RoHS certified finishes, these connectors ensure durability and performance. Whether for front or rear wall mounting or jam nut receptacles, the MIL-DTL-38999 Series I connectors with bayonet coupling are trusted for military and industrial applications.