Screw

From Wikipedia, a free encyclopedia written in simple English for easy reading.

A screw is a sharp piece of threaded metal similar to a nail. Unlike a nail, a screw has spiraling grooves down its spike. A screw is pressed down against wood and spun with a screwdriver so the wood goes into the grooves. This prevents the screw from falling out, as a nail could. Screws are basically divided in to Wood Screws , Machine Screws and Self tapping Screws.

Machine Screws have threads which have to be matched with nuts with female threads. Screws can be made of Iron , Steel, Brass ,Bronze etc.


Screw threads are measured either in mm or in numbers. screws are used in furniture, doors, appliances, mechanical applications etc.



External Links


This short article can be made longer. You can help Wikipedia by adding to it.