Answer: tappers

AnswerCrossword Clue
TAPPERSTelegraph keys
TAPPERSTelegraph keys.
TAPPERSHines and Glover, e.g.
tappersTAPPER, one that taps (to strike gently)
tappersperson who cuts screw threads into the surface of a circular opening, as of a pipe, nut, etc.
tappersperson or thing that taps or strikes lightly
tapperstelegraph key
tappersperson or thing that taps, as trees for the sap or juice, a blast furnace, cask, or other container for their contents, etc.