Back Head Ass’y – Dry, American Pneumatic Tool part number 1280582604 the number that superseded 01629, listed at Crowder Supply as APT1629. 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.
It shows up in the parts breakdown for the 155 Rock Drill. Check it against the reference number on the diagram first; serial breaks change what fits.
The full diagram library indexes every breakdown we publish, and the American Pneumatic catalog has the tools these parts go into. Denver stock, with same-day shipment on in-stock orders in by 4 PM ET.
- Part number: 1280582604
- Previous part number: 01629
- Manufacturer: American Pneumatic Tool
- Crowder SKU: APT1629
- Listed on breakdowns for: 155 Rock Drill
