Right-hand Rule - The Right-handed Screw

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.