| 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} |
| 347 | DF | .~ Headed fastener element with securing means and biasing spring {2} |
| 349 | DF | .~.~ Securing means rotatable about fastener element or rotatably engageable by tool-rotatable headed fastener element {3} |
| 549 | DF | .~.~.~ Outwardly extending projection cooperates with socket member having ramp engagement means {3} |
| 550 | DF | .~.~.~.~ Including means providing axial adjustment {1} |
| 551 | | .~.~.~.~.~ Threaded adjustment |