Product Overview This square steel washer is engineered for facade support systems, manufactured from carbon steel (Q235 / Q355) with a hot-dip galvanized (HDG) surface treatment. It delivers a cost-effective, durable solution suitable for curtain wall projects in dry, inland environments. Hot-dip galvanizing provides the highest level of corrosion resistance and is the standard choice for steel-structured facades in China. For coastal areas exposed to salt spray or highly