LITTLE KNOWN FACTS ABOUT TYPES OF SCREW HEADS.

this sort of screw is a non-structural fastener. It is supposed to be tightened and loosened by hand utilizing the ridged sides. Some can also be designed that has a critical-like flat aspect or fashioned for flat or Phillip head screwdrivers. Pozidriv: Popular in Europe, these screws Possess a cross-formed slot using a shallower, X-formed slot im