This is American Pneumatic Tool part number 1280583039, which replaced the older number 18717 retainer buffer, stocked at Crowder Supply as APT18717. This part keeps the steel captive in the scaler under repeated impact, so it is inspected at every steel change and replaced on condition rather than on a schedule.
Crowder’s breakdowns list this part on the 307 & 317 Needle Scaler. The tool itself is the APT 307 Pneumatic Needle Scaler. Check it against the reference number on the diagram first; serial breaks change what fits.
Everything else on that machine is one page away, and the parts breakdown index indexes every breakdown we publish. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: 1280583039
- Previous part number: 18717
- Manufacturer: American Pneumatic Tool
- Crowder SKU: APT18717
- Listed on breakdowns for: 307 & 317 Needle Scaler
