SQUARE WASHER ZINC (YELLOW)

Square washers with a zinc yellow (yellow chromate) finish are primarily used to distribute the load of a fastener and prevent damage to the mating material. They are made from mild steel and are intended for internal use due to their moderate corrosion protection. 

Key Product Details & Features
Function: These washers increase the bearing surface of a nut or bolt head, spreading the clamping force over a larger area to prevent the deformation of soft materials (such as timber) or damage around oversized/irregular holes.
Material: They are typically made from mild steel.
Finish: The finish is zinc yellow passivate (also known as yellow chromate), which enhances the corrosion protection of the base zinc plating.
Corrosion Protection: This finish provides an average/moderate level of protection and is mainly recommended for internal or low-corrosion applications. For outdoor or highly corrosive environments, galvanised or stainless steel options are better suited.
Common Applications: They are frequently used in the automotive industry, timber building, and concrete floor applications.