7212.30 - Otherwise plated or coated with zinc:

This HTS category, 7212.30, encompasses flat-rolled products of iron or nonalloy steel with a width less than 600 mm that are otherwise plated or coated with zinc, but not through an electrolytic process. This distinction is crucial for accurate classification. It covers items that have undergone a zinc coating application method other than electrolysis, such as hot-dip galvanizing, sherardizing, or other mechanical plating processes that result in a zinc layer.

To differentiate from its siblings, note that 7212.10.00.00 covers tin plating, while 7212.20.00.00 specifically deals with electrolytically plated or coated zinc products. Furthermore, 7212.40 pertains to products painted, varnished, or coated with plastics, and 7212.50.00.00 addresses other forms of plating or coating not involving zinc. Category 7212.60.00.00 is reserved for clad products, where a layer of another metal is bonded to the base steel.

Within this category, subcategories exist to further refine the classification based on the width of the flat-rolled product. Specifically, products "of a width of less than 300 mm" will fall under further subdivisions, indicating that the precise dimensions are a key factor in determining the final HTS code. The remaining products, not fitting the <300mm criteria, are classified under "Other" within this group.