This is the Atlas Copco retainer 7/8 x 4-1/4 part number 3111006700, Crowder SKU AC-3111006700. Retaining the tool steel is its whole job. Worn retention lets the shank hammer against the bore and turns a cheap part into an expensive front head.
Matching it to a machine? Send us the model and serial and we will confirm the fit, or work back from the parts breakdown index. Complete tools are on the Atlas Copco catalog. Stocked in Denver orders placed by 4 PM ET ship the same day when the part is on the shelf.
- Part number: 3111006700
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3111006700