What is a self tapping screw and self tapping screw application

Update time:2014-04-03  Source: RFS  

what is Self tapping screw:

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.

Self tapping screw spike

Self tapping screw application:

Self tapping screw is to screw in something that needs to be screwed in the wall or anywere !

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