O-Ring is the American Pneumatic Tool service part carried under part number 1280583019, listed as 18697 before the renumbering. Seals like this one are consumables in a scaler they are cheap, they age with heat and hours, and replacing the whole set during a teardown saves a second strip-down later.
You will find it on the diagram for the 307 & 317 Needle Scaler. That machine is the APT 307 Pneumatic Needle Scaler if you are pricing a replacement rather than a repair. Compare it to the reference callout on the diagram to be sure it is the position you need.
Everything else on that machine is one page away, and the full diagram library indexes every breakdown we publish. Denver stock, with same-day shipment on in-stock orders in by 4 PM ET.
- Part number: 1280583019
- Previous part number: 18697
- Manufacturer: American Pneumatic Tool
- Crowder SKU: APT18697
- Listed on breakdowns for: 307 & 317 Needle Scaler
