The Right-handed Screw
Curl the fingers of your right hand around a screw and turn it in the direction of your fingers. If it moves in the direction of your thumb the screw is right-handed. Most screws are right-handed. Control knobs can be either right-handed or left-handed (Think of turning on a radio.). 'Clockwise' can be considered right-handed if your thumb points toward the clock or left-handed if your thumb points away from the clock.
Read more about this topic: Right-hand Rule
Famous quotes containing the word screw:
“Let us have a good many maples and hickories and scarlet oaks, then, I say. Blaze away! Shall that dirty roll of bunting in the gun-house be all the colors a village can display? A village is not complete, unless it have these trees to mark the season in it. They are important, like the town clock. A village that has them not will not be found to work well. It has a screw loose, an essential part is wanting.”
—Henry David Thoreau (1817–1862)