The MIL-DTL-38999 Series I connectors offer high-performance connectivity for demanding environments. Featuring up to 128 contacts in an insert, these circular connectors are designed for durability, with a wide operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, they come in wall mount, rear mount, and jam nut receptacle options, all sealed for environmental protection. Utilizing M39029 rear release crimp contacts, these connectors ensure reliable connections, with plating options including gold for enhanced conductivity. RoHS compliant finishes are also available. With a rugged aluminum shell construction and bayonet coupling for secure mating, these connectors are ideal for military and industrial applications requiring high reliability and performance in harsh conditions.