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This complete assembly includes an 8.8‑grade hex bolt, hex nut, flat washer, and spring washer, finished by hot‑dip galvanizing for superior anti‑corrosion performance. Grade 8.8 provides high mechanical strength; the hot‑dip galvanized coating resists rust in outdoor, coastal, and harsh environments. Widely used for steel structures, power towers, bridges, construction, and outdoor engineering projects.