Fasco 1302a Shaft Bushing 5/16 to 3/8 Inch 4-pack

Product Description

The FASCO 1302a is a shaft bushing designed to adapt a 5/16-inch shaft to a 3/8-inch bore, sold in a 4-pack. These bushings are used in motor and blower assemblies to provide a precise fit between a motor shaft and a fan wheel or blower wheel hub. They are a small but critical component — an improper fit at the shaft can cause vibration, noise, and premature bearing wear. HVAC technicians and motor service professionals install these during motor replacements or blower wheel service when the replacement motor shaft diameter does not match the original wheel bore.

These bushings are commonly used in residential and light commercial HVAC applications, including furnace indoor blower assemblies, fan coil units, and air handling equipment. When a technician swaps a motor and finds a shaft-to-wheel size mismatch between 5/16 inch and 3/8 inch, this bushing closes that gap without requiring a new blower wheel. The 4-pack quantity is useful for service trucks and shop stock, covering multiple jobs with a single order.

Key Features

• Adapts a 5/16-inch motor shaft to a 3/8-inch wheel bore
• Sold in a 4-pack for multi-job service use
• Lightweight at 0.05 pounds per pack, minimal added mass at the shaft
• OEM-style fit for common HVAC motor and blower wheel pairings

Compatibility

Designed as an OEM-style replacement bushing for HVAC blower and fan motor assemblies requiring a 5/16-inch to 3/8-inch shaft-to-bore adaptation. Specific compatible motor and blower wheel models were not provided in the product data.

Installation Notes

Installation is performed by licensed HVAC technicians during motor replacement or blower wheel service. Always disconnect and lock out power to the air handler, furnace, or fan coil unit before accessing the blower assembly. Seat the bushing fully and evenly on the shaft before tightening the set screw on the blower wheel hub to avoid wobble or runout. Confirm the wheel spins freely without wobble before restoring power.

Technical Specifications

• Shaft Size: 5/16 inches
• Bore Size: 3/8 inches
• Pack Quantity: 4
• Weight: 0.05 pounds

Standard Information

• Brand: FASCO
• Manufacturer Part Number: 1302a