This is a 5/16" left-hand bump knob replacement for the Oregon 55-994 Bump and Go Trimmer Head. Oregon replacement parts are built to meet or exceed OEM standards. Many parts look similar, so it’s crucial to ensure you’re choosing the right replacement for your original equipment or engine model. Not sure? Use our Parts Lookup Tool to view part diagrams and find the correct replacement.

• 5/16" Left-hand thread
• Used for Oregon 55-994 Bump and Go Trimmer Head
• Bump knob for curved-shaft trimmers with extended spindle shafts
• This part ensures proper fit and performance to maintain the life of your equipment

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