The head within your screw is the location in which it can prevent outside the house the area of one's undertaking/materials. Each and every screw head serves a distinct goal and it is made to be used for particular applications or materials. This is often designated in threads per inch https://types-of-decking05937.therainblog.com/28716258/5-essential-elements-for-types-of-screwdriver-heads-names