O-Ring carries Chicago Pneumatic part number 4700W65033 and is stocked here under CP-4700W65033. It keeps air or oil where it belongs inside the tool. Once it flattens or hardens, the machine loses pressure across the joint and performance falls off gradually rather than all at once.

If you are working from a machine rather than a part number, start at the full diagram library, or send us the model and serial and we will match it. Machines themselves are on the CP tool catalog. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.

• Part number: 4700W65033
• Manufacturer: Chicago Pneumatic
• Crowder SKU: CP-4700W65033