Husqvarna Lawn & Garden Equipment Lock Nut 873930500

Basic information

• Part name: Lawn and garden equipment lock nut
• Manufacturer: Husqvarna
• Category: Lawn and garden equipment hardware and fasteners
• Primary function: Secures bolts and studs while resisting loosening from vibration

Technical specifications

• Thread size: 5/16-18 UNC

Installation & compatibility

• Compatible models: Fits select Husqvarna, Craftsman, Poulan, Sears, Jonsered, Weed Eater, Ariens, Dixon, Murray, Companion, and Southern States lawn and garden equipment models; confirm compatibility using your models parts diagrams
• Installation difficulty: Easy; threads onto a matching bolt or stud and tightens to secure components
• Tools required: Wrench set

Additional information

This lock nut threads onto a bolt or stud and helps hold components firmly in place during equipment operation. Lawn and garden equipment lock nut 873930500 uses a locking feature to reduce loosening caused by vibration.

If fasteners repeatedly loosen, components shift during operation, or threads no longer hold securely, the lock nut may be worn or damaged. Stripped threads, loss of locking tension, or corrosion are common signs replacement is needed.

Disconnect the spark plug wire or battery, if applicable, before starting the repair. Thread the lock nut onto clean, undamaged threads and tighten it securely to the specified torque. Replace the nut if resistance feels inconsistent or the locking feature no longer engages.

Lawn and garden equipment lock nut 873930500 replaces part numbers 73930500, 73560500, 195780, 532155552, 532195780, 155552.