
Heavy-Duty Hex Bolt for Modular Steel Water Tanks - 8.8 Grade Strength. High Strength Grade 8.8: Carbon steel bolts meeting ASTM A325/A490 standards for heavy-duty applications. Corrosion Resistant Coating: Environmentally friendly, heat-resistant, and corrosion-resistant thickened coating. Customization Available: Custom screws, bolts, and special nuts available with drawing and sample production. Wide Size Range: Metric M12 and Imperial 1/2 UNC series with multiple lengths in stock. ISO 9001 Certified: Manufacturing process certified under ISO 9001:2015 for quality assurance. Free Samples: Free samples for standard fasteners; new customers pay express cost. 20+ Years Experience: Over 20 years of business serving global water treatment and storage tank manufacturers. Flexible Delivery: Delivery time of 30-45 days, flexible according to order quantity.