This is Atlas Copco part number 3111003900 back head, stocked at Crowder Supply as AC-3111003900. 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 hub 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 tool range. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: 3111003900
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3111003900