This is the American Pneumatic Tool retainer housing Ass’y part number 1280583524, listed as 03398 before the renumbering, Crowder SKU APT3398. It holds the working steel in the rock drill. Retention hardware is a wear and safety item a stretched or cracked retainer lets the steel move, which chews the front head.
It appears on the 115 Rock Drill breakdown. The complete machine is the APT 115 Pneumatic Rock Drill. Compare it to the reference callout on the diagram to be sure it is the position you need.
Work through the rest of the assembly on the same breakdown, or start over from the parts breakdown index. It ships out of Denver, same day on in-stock orders placed before 4 PM ET.
- Part number: 1280583524
- Previous part number: 03398
- Manufacturer: American Pneumatic Tool
- Crowder SKU: APT3398
- Listed on breakdowns for: 115 Rock Drill

