Washer – 11/16″ X .119, American Pneumatic Tool part number 1280583781, which replaced the older number 02400, listed at Crowder Supply as APT2400. This distributes bolt load across the joint face on the rock drill. Flattened or dished washers are replaced during reassembly.
It appears on the 137 Rock Drill breakdown. It comes off the APT 137 Pneumatic Rock 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: 1280583781
- Previous part number: 02400
- Manufacturer: American Pneumatic Tool
- Crowder SKU: APT2400
- Listed on breakdowns for: 137 Rock Drill

