| 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} |
| 366.1 | DD | .~ Headed bolt or screw with threads and complementary nut {4} |
| 366.2 | | .~.~ Flush mount or low profile |