Back Head, American Pneumatic Tool part number 1280582775 the number that superseded 05899, listed at Crowder Supply as APT5899. It caps the cylinder and houses the throttle path on a rock drill. Thread damage at the inlet is the most common reason one gets replaced.
You will find it on the diagram for the 155 Rock Drill. Check it against the reference number on the diagram first; serial breaks change what fits.
If you need the parts around it, the full diagram library has the full breakdown library, and the American Pneumatic catalog covers the machines themselves. Stocked in Denver orders placed by 4 PM ET ship the same day when the part is on the shelf.
- Part number: 1280582775
- Previous part number: 05899
- Manufacturer: American Pneumatic Tool
- Crowder SKU: APT5899
- Listed on breakdowns for: 155 Rock Drill
