O-Ring, American Pneumatic Tool part number 1280179543, which replaced the older number 19441, listed at Crowder Supply as APT19441. Its job is to hold the pressure boundary between two mating faces; a hardened or nicked seal shows up as lost power and a damp housing well before anything else fails.
Crowder’s breakdowns list this part on the 133CN T-Handle Rivet Buster and 1133CN T-Handle Rivet Buster. That machine is the APT 133 Pneumatic Rivet Buster if you are pricing a replacement rather than a repair.
The rest of the assembly is on the same breakdown, and every diagram we publish is indexed on the parts diagram library. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.
- Part number: 1280179543
- Previous part number: 19441
- Manufacturer: American Pneumatic Tool
- Crowder SKU: APT19441
- Listed on breakdowns for: 133CN T-Handle Rivet Buster, 1133CN T-Handle Rivet Buster
