Snapper Snowblower Flange Lock Nut 722391

Basic Information

• Part name: Snowblower flange lock nut
• Manufacturer: Briggs & Stratton
• Category: Snowblower hardware
• Primary function: Secures components and resists loosening under vibration

Technical Specifications

• Thread size: 3/8-24

Installation & Compatibility

• Compatible models: Fits select Snapper snowblower models; confirm capability using your models parts diagrams
• Installation Difficulty: Medium; may require partial disassembly
• Tools required: Wrench, socket set

Additional Information

The snowblower flange lock nut, part number 722391, threads onto a matching bolt and helps keep components clamped securely while resisting loosening caused by vibration and movement. The flange spreads clamping force over a wider area compared to a standard nut.

If fasteners loosen over time, you hear rattling near connection points, or components shift under load, a worn, missing, or loose flange lock nut may be allowing hardware to back off. Stripped threads or a nut that will not tighten properly can also prevent assemblies from staying secure.

Disconnect the spark plug wire before beginning the repair. The flange lock nut installs near metal edges and moving parts, so work gloves can help protect your hands during removal and installation. Tighten the nut securely without overtightening to avoid thread damage before reconnecting the spark plug wire.