This is American Pneumatic Tool part number 1280583021, previously 18699 O-Ring, stocked at Crowder Supply as APT18699. Its job is to hold the pressure boundary between two mating faces; a hardened or nicked seal shows up as lost power and a damp housing well before anything else fails.
Crowder’s breakdowns list this part on the 307 & 317 Needle Scaler. The complete machine is the APT 307 Pneumatic Needle Scaler. Pull up the diagram and confirm the reference number for your serial before ordering.
Need the parts around it? They are on the same breakdown, and the parts diagram hub covers every machine we publish. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: 1280583021
- Previous part number: 18699
- Manufacturer: American Pneumatic Tool
- Crowder SKU: APT18699
- Listed on breakdowns for: 307 & 317 Needle Scaler
