O-Ring, American Pneumatic Tool part number 1280179535, which replaced the older number 19435, listed at Crowder Supply as APT19435. 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.
It is called out in the parts diagram for the 133CN T-Handle Rivet Buster and 1133CN T-Handle Rivet Buster. It comes off the APT 133 Pneumatic Rivet Buster. Compare it to the reference callout on the diagram to be sure it is the position you need.
Everything else on that machine is one page away, and the full 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: 1280179535
- Previous part number: 19435
- Manufacturer: American Pneumatic Tool
- Crowder SKU: APT19435
- Listed on breakdowns for: 133CN T-Handle Rivet Buster, 1133CN T-Handle Rivet Buster
