| 411 / | HD | EXPANDED, THREADED, DRIVEN, HEADED, TOOL-DEFORMED, OR LOCKED-THREADED FASTENER |
| 337 | DF | HEADED FASTENER ELEMENT WITH NUT, WASHER, SECURING MEANS OR CAP {12} |
| 371.2 | | .~ Washer adjacent head and having a particular shape (e.g., dished) or composition {1} |
| 372 | DF | .~.~> And separate attaching or retaining means |