DIN 9021 refers to a large flat washer standard. These washers have a larger outer diameter compared to standard flat washers like DIN 125, which allows for a greater load distribution.
Shape:
Circular with a large outer diameter and a central hole for bolts or screws.
Purpose:
Distributes the load over a wider area, reducing surface damage.
Ideal for use with soft materials (e.g., wood, plastic) or oversized holes.
Material:
Available in steel, stainless steel (A2, A4), brass, and nylon.
Often coated (zinc-plated, hot-dip galvanized, etc.) for corrosion resistance.
Applications:
Common in construction, automotive, and industrial machinery.
Used where a stronger load-bearing surface is needed.
Sizes:
Available in standard metric sizes to fit different bolts and screws.
DIN 9021 washers are preferred when a larger surface area is needed to ensure secure fastening and prevent material damage.
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