Definitions for "SCREW THREAD"
A ridge of constant section which is manufactured so that a helix is developed on the internal or external surface of a cylinder.
A screw thread is a continuous and projecting helical ridge usually of uniform section on a cylindrical or conical surface.
the raised helical rib going around a screw
Keywords:  inclined, pencil, ramp, plane, triangle
an extension of one of the basic machines, the inclined plane that, has been wrapped around a shaft
a simple type of machine, acting like a rolled-up inclined plane, or ramp (as may be illustrated by rolling a long paper triangle around a pencil)