Ordering by number: this is 3310112881, the Atlas Copco back head – complete. It caps the cylinder and houses the throttle path on a tool. Thread damage at the inlet is the most common reason one gets replaced.

The parts diagram library is where to start if you are working back from a machine or send the model and serial and we will confirm it. Complete tools sit on the Atlas Copco lineup. Stocked in Denver orders placed by 4 PM ET ship the same day when the part is on the shelf.

• Part number: 3310112881
• Manufacturer: Atlas Copco
• Crowder SKU: AC-3310112881