This is Atlas Copco part number 3111006880 back head – complete, stocked at Crowder Supply as AC-3111006880. The back head closes the top of the tool and carries the air inlet and control gear, so damage here usually shows up as a leak at the handle rather than lost power.

The parts breakdown index 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 catalog. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.

• Part number: 3111006880
• Manufacturer: Atlas Copco
• Crowder SKU: AC-3111006880