| 411 / | HD | EXPANDED, THREADED, DRIVEN, HEADED, TOOL-DEFORMED, OR LOCKED-THREADED FASTENER |
| 439 | DF | IMPACT DRIVEN FASTENER, E.G., NAIL, SPIKE, TACK, ETC. {13} |
| 442 | ![]() | .~ Plural attached fasteners {3} |
| 443 | DF | .~.~> Integral strip |
| 444 | DF | .~.~> Laterally attached only at head or bridge |
| 445 | DF | .~.~> Attached end-to-end |