NOT KNOWN FACTUAL STATEMENTS ABOUT TYPES OF SCREW HEADS

This type of screw is often a non-structural fastener. It is supposed to be tightened and loosened by hand using the ridged sides. Some will also be made that has a important-like flat aspect or fashioned for flat or Phillip head screwdrivers. In this process the holes are pre drill in addition with proper head angle which helps in producing compl