This is Chicago Pneumatic part number P004839, also listed as 3310104096 bushing, stocked at Crowder Supply as CP-P004839. Bushings carry the running clearance in a rivet buster. They are meant to wear first, which is exactly why they are a stocked service item.
The published breakdown lists it on the CP 4608 4611 Rivet Buster and CP 4160 Rivet Buster, and on 1 other machine. It comes off the CP 4160 Pneumatic Rivet Buster. Check it against the reference number on the diagram first; serial breaks change what fits.
Everything else on that machine is one page away, and the parts diagram library indexes every breakdown we publish. Stocked in Denver orders placed by 4 PM ET ship the same day when the part is on the shelf.
- Part number: P004839
- Also listed as: 3310104096
- Manufacturer: Chicago Pneumatic
- Crowder SKU: CP-P004839
- Listed on breakdowns for: CP 4608 4611 Rivet Buster, CP 4160 Rivet Buster, CP 4181 Puler Puser Rivet Buster

