I don't think it's long enough or thick enough to be considered a nail; I would say it's more like a pin.
Tack
with a nail
Tack
tack, pushpin, or pin
a tack
brad <><><> or tack
It could be a brad or a tack
tack!
Pin , Scissors , Sharp nail/tack
thumb nail, thumb tack, thumb screw, thumb print
To install carpet tack strips, first measure and cut the strips to fit the perimeter of the room. Then, nail the strips to the subfloor, leaving a small gap between the strip and the wall. Finally, stretch the carpet over the tack strips and use a knee kicker to secure it in place.
To install tack strips for carpet, first measure and cut the strips to fit the perimeter of the room. Then, nail the strips to the subfloor, leaving a small gap between the strip and the wall. Finally, stretch the carpet over the tack strips and use a knee kicker to secure it in place.