Armstrong Fluid Technology 816665-000 Coupler 321042-401 Always verify your specific model

Always verify your specific model and serial number against the manufacturer's parts list to ensure the correct blower assembly size

this OEM Carrier motor provides the torque and thermal protection required to prevent premature winding failure

making it the primary solution for Carrier 310553-751 replacement needs

While primarily used in air handlers and ventilation

both parts are technically identical

Armstrong Fluid Technology 816665-000 Coupler 321042-401 Always verify your specific modelOptimize your HVACR system's performance with the Armstrong Fluid Technology 816665 000 Coupler. This high quality sleeve type coupler assembly is a critical OEM replacement part designed for seamless torque transfer between the motor and pump shaft. Engineered specifically for Armstrong Series 1060 and S&H Series circulator pumps, this 5 8" x 5 8" coupler ensures a vibration free connection that extends the operational life of your equipment. Built