Flat Washers Form 'G' Zinc Plated

Form G washers are similar to the standard form A washer, but have a much larger outside diameter and are considerably thicker.  These are great for use in heavier duty applications.  The dimensions for these washers can be found here.

Zinc coatings prevent oxidation of the protected metal to create a longer lasting finish. It does this by forming a barrier and by acting as a sacrificial anode if this barrier is damaged. Zinc oxide is a fine white dust that (in contrast to iron oxide) does not trigger a breakdown of the substrates surface integrity as it is formed. The zinc oxide, if left intact, can act as a barrier to further oxidation, in a way similar to the protection afforded to aluminium and stainless steels by their oxide layers.