LITTLE KNOWN FACTS ABOUT TYPES OF SCREW HEADS.

Little Known Facts About types of screw heads.

To provide more safety a chemical passivation is placed on the zinc coating. This can be a chemical chromate that leads to a yellow colour and also a more challenging surface. This screw end is frequently abbreviated to “ZYP” or Zinc and Yellow Passivated. A Phillips tamper-resistant screw is identical to a Phillips travel screw with one large

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