This is American Pneumatic Tool part number 1280583511, previously 03307 O-ring – seal #2-123, stocked at Crowder Supply as APT3307. It keeps air or oil where it belongs inside the breaker. Once it flattens or hardens, the machine loses pressure across the joint and performance falls off gradually rather than all at once.
The published breakdown lists it on the 160 Paving Breaker and 160A Airgo Paving Breaker. Compare it to the reference callout on the diagram to be sure it is the position you need.
The parts diagram library indexes every breakdown we publish, and the American Pneumatic Tool range has the tools these parts go into. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.
- Part number: 1280583511
- Previous part number: 03307
- Manufacturer: American Pneumatic Tool
- Crowder SKU: APT3307
- Listed on breakdowns for: 160 Paving Breaker, 160A Airgo Paving Breaker

