This is Atlas Copco part number 3121089400 nut, stocked at Crowder Supply as AC-3121089400. It carries the clamp load on its stud or bolt. On an impact tool, thread and face condition matter a nut that has been run down over damaged threads will not hold torque.
Crowder’s breakdowns list this part on the BBC 34DSI Rock Drill and BBC 34W WS Pusher Leg 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.
The rest of the assembly is on the same breakdown, and every diagram we publish is indexed on the parts diagram library. Stocked in Denver orders placed by 4 PM ET ship the same day when the part is on the shelf.
- Part number: 3121089400
- Manufacturer: Atlas Copco
- Crowder SKU: AC-3121089400
- Listed on breakdowns for: BBC 34DSI Rock Drill, BBC 34W WS Pusher Leg Drill
