Galvanizing small parts, hardware, and fasteners to ASTM A153
ASTM A153 governs zinc coatings applied by the hot-dip process on iron and steel hardware, including nails, bolts, nuts, fasteners, and rods. The hot-dip galvanizing process for articles galvanized to ASTM A153 is identical to the process required under ASTM A123 with the exception the iron and steel hardware in ASTM A153 are centrifuged or spun to remove excess zinc. This is reflected in the coating thickness required by ASTM A153 being slightly less than those required under ASTM A123. Table 1 of the specification calls out the thickness or weight (mass) of zinc coating required for various classes of material. Classes of material are based on thickness and length.
This specification also prescribes finish & appearance, sampling, test methods and inspection of the finished part.
Hot-Dip Galvanized Fasteners