This is Chicago Pneumatic part number 470W209785 lock nut, stocked at Crowder Supply as CP-470W209785. It secures its joint against constant vibration, which is why it is treated as a replaceable item rather than a permanent one.

Matching it to a machine? Send us the model and serial and we will confirm the fit, or work back from the full diagram library. Complete tools are on the CP tool catalog. Stocked in Denver orders placed by 4 PM ET ship the same day when the part is on the shelf.

• Part number: 470W209785
• Manufacturer: Chicago Pneumatic
• Crowder SKU: CP-470W209785