Air Inlet Seal, Atlas Copco part number 3121501900, listed at Crowder Supply as AC-3121501900. This is the supply connection for the tool. Damaged threads or a chewed sealing face cost pressure at the working end.

Give us the model and serial off your machine and we will confirm the fit; the full diagram library and the Atlas Copco catalog are the other two places to start. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.

• Part number: 3121501900
• Manufacturer: Atlas Copco
• Crowder SKU: AC-3121501900