This is American Pneumatic Tool part number 1280582711, which replaced the older number 18781 O-Ring and seal kit, stocked at Crowder Supply as APT18781. Kits like this group the parts that get replaced together, which saves ordering them one at a time and cuts a second teardown out of the job.
It is called out in the parts diagram for the 109 Mini Rock Drill. That machine is the APT 109 Pneumatic Rock Drill if you are pricing a replacement rather than a repair. Pull up the diagram and confirm the reference number for your serial before ordering.
Work through the rest of the assembly on the same breakdown, or start over from the full diagram library. Denver stock, with same-day shipment on in-stock orders in by 4 PM ET.
- Part number: 1280582711
- Previous part number: 18781
- Manufacturer: American Pneumatic Tool
- Crowder SKU: APT18781
- Listed on breakdowns for: 109 Mini Rock Drill
