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1. Weather Resistance One of the standout features of EPDM is its ability to withstand extreme weather conditions. EPDM washered fasteners perform exceptionally well in outdoor applications where exposure to rain, sunlight, and fluctuating temperatures is unavoidable. This durability translates into fewer maintenance requirements and longer service life for structures and equipment.

Another crucial aspect of bolt structure is the surface treatment of bolts, which can significantly improve their performance. Surface treatments such as galvanization, coating, or anodizing can enhance a bolt's resistance to corrosion and wear, extending its service life. For instance, galvanized bolts are coated with zinc to prevent rusting, making them suitable for outdoor applications. Similarly, anodized bolts, commonly used in aluminum alloys, have a protective oxide layer that not only enhances corrosion resistance but also improves aesthetic appeal.