self tapping screw |
Self Tapping Screw is a kind of fastener that could cut or drill inner thread inside a pre-drill non-awl hole. Basically it is made by limits materials. If possible, it would make the case hardness or it also could be covered or plated by many materials. Self Tapping Screws could be made of different head types or drive. It could be machine thread or wide thread. Most of the self tapping screws have the awl point. This kind of point could cut or drill the thread easily to form the inner thread in the pre-drill hole. Self tapping screw’s point could be the fastener that designed to flat'cut a line and / or self tapping. |
