screw
A pyramid with 18 edges would be called a nonagonal pyramid. A prism with 18 edges is called a hexagonal prism.
eaves
A self-tapping screw can be used to join two pieces of plastic or metal with simple holes drilled into them. A "normal" screw requires one of the holes to be "tapped" - a spiral has to be cut into one of the holes to accept the screw. Tapping holes is something of a game of skill; the tapping tools use very hard, brittle steel and it's easy to break a tool in the hole.
An endpoint where two edges intersect on a polyhedron is called a vertex.
Thread
It's twists in circles like the shaft of a screw has that spiral
It's twists in circles like the shaft of a screw has that spiral
Thread
A spiral staircase is a type of screw. A spiral staircase is a type of screw.A spiral staircase is a screw. So it is an inclined plane.
This is a simple machine called a screw.
A screw is an inclined plane in a spiral.
A spiral slide
An inclined plane wrapped around a central cylinder to form a spiral is called a screw or a bolt.
A screw operates by a raised ledge which proceeds up the shaft of the screw in a spiral. This raised ledge is called the thread of the screw. Since the spiral can either proceed in a clockwise or counterclockwise manner, we distinguish between right-hand thread screws (counterclockwise as viewed from above) and left-hand thread screws (clockwise).
A serpentine. examples would be: a screw or a spiral staircase.
A serpentine. examples would be: a screw or a spiral staircase.