O-RING is the Atlas Copco service part carried under part number 9232120360. Its job is to hold the pressure boundary between two mating faces; a hardened or nicked seal shows up as lost power and a damp housing well before anything else fails.

If you are working from a machine rather than a part number, start at the parts breakdown index, or send us the model and serial and we will match it. Machines themselves are on the Atlas Copco catalog. Denver stock, with same-day shipment on in-stock orders in by 4 PM ET.

• Part number: 9232120360
• Manufacturer: Atlas Copco
• Crowder SKU: AC-9232120360