The 1/2" x 3 1/8" shaft with a flat provides a secure fit for fan blades

Thermal Overload Protection: Integrated internal reset prevents winding failure during restricted airflow conditions or high-ambient cycles

the 35-679655-551 includes a local reset function

ensuring precise airflow management and consistent static pressure handling across the heat exchanger

check your internal rack depth to confirm clearance for thicker media

Heil Quaker ICP 1184517 Loose Parts Bag 318423-701 The 1/2" x 3 1/8"The Heil Quaker ICP 1184517 Loose Parts Bag is a critical OEM replacement hardware kit designed for high efficiency 90% and 95%+ AFUE gas furnaces. As a veteran technician knows, losing a specialized vent coupling or pressure tube during a 96% AFUE unit install can stall a job. This comprehensive furnace installation kit includes the exact technical specifications required for International Comfort Products (ICP) units, featuring a choke outlet plate,