A REVIEW OF TYPES OF SCREW HEADS

this sort of screw is usually a non-structural fastener. It is supposed to get tightened and loosened by hand using the ridged sides. Some can also be manufactured which has a important-like flat facet or fashioned for flat or Phillip head screwdrivers. A Pozidriv screwdriver options parallel flanks, a blunt tip, and additional tiny ribs which can