
Hex Head Bolt M20X80mm 10.9 Grade for Storage Tank Shell Assembly. High-Strength Fastening: 10.9 Grade carbon steel bolts designed for storage tank shell assembly and large metal structures. Corrosion Resistant Coating: Environmentally friendly, heat-resistant, and corrosion-resistant thickened coating for long-term protection. 20+ Years Experience: Leading manufacturer with over 20 years of experience serving global water treatment and storage tank clients. Comprehensive Standards: Supports ISO, DIN, ANSI, and ASTM standards with metric and imperial thread specifications available. Customization Options: Offers custom fasteners, OEM/ODM services, and optional accessories like rubber washers and plastic caps. Quality Assurance: Strict QC inspection at every step with MTC, mill certificate, and ISO 9001:2015 certification. Global Reach: Serving customers in over 80 countries with reliable quality and one-to-one service support. Flexible Delivery: Delivery time of 30-45 days, flexible based on order quantity, shipped from Ningbo port.