ABOUT TYPES OF SCREW HEADS

About types of screw heads

To provide all the more defense a chemical passivation is applied to the zinc coating. This is often a chemical chromate that ends in a yellow colour plus a harder surface. This screw end is usually abbreviated to “ZYP” or Zinc and Yellow Passivated. The shortage of centring signifies that the screwdriver little bit can slip (‘cam-out’), e

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