Ordering by number: this is 3121033200, the Atlas Copco lock washer. It spreads clamp load and protects the face under the fastener routine hardware, but the wrong one changes how the joint holds torque.
Crowder’s breakdowns list this part on the RH 658L/LS/LS-01 Rock Drill and RH 656W Rock Drill. The complete machine is the RH 658 L Surface Rock Drill. Worth matching the reference number on the diagram against your own machine before you order the same part number can sit in more than one position.
Need the parts around it? They are on the same breakdown, and the full diagram library covers every machine we publish. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.
- Part number: 3121033200
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3121033200
- Listed on breakdowns for: RH 658L/LS/LS-01 Rock Drill, RH 656W Rock Drill
