Wiktionary
tighteners
n. (plural of tightener English)
Usage examples of "tighteners".
The loose-screw tighteners at the State Hospital really gave me a good goin-over, fore and aft, up and down, in and out, all night long, don’t never take a hotel room right by the elevator.
The wooden friction blocks squealed against their screw tighteners as they slowed the multitonne weight of cast iron and steel.
For those who were not in the know, it had to come down to faith in the planners and leaders, and in the people all the way down the line, to the ground crews now going through the long Hercules maintenance checkoff list, to the very tighteners of screws on the cowlings.