NOT KNOWN FACTUAL STATEMENTS ABOUT TYPES OF SCREW HEADS

to offer a lot more protection a chemical passivation is placed on the zinc coating. This is a chemical chromate that brings about a yellow colour as well as a harder floor. This screw end is frequently abbreviated to “ZYP” or Zinc and Yellow Passivated. Slotted- slotted drive screws are very frequently used and easy to find. The slotted reces