Since 1990, Tank Bolt (Ningbo Zhonglian Fasteners) has focused on one thing: high‑strength fasteners for storage tanks and silos. Over more than 35 years, we have grown from a regional bolt workshop into a specialized manufacturer supplying fin bolts, silo bolts, anchor bolts, nuts and washers for water, fire protection and industrial tank projects around the world.
Our factory in Ningbo, China is equipped with modern cold‑forming, heat treatment and hot‑dip galvanizing facilities dedicated to tank and silo hardware. Every bolt is produced and tested to meet demanding international standards such as EN, ISO and ASTM, with full traceability from raw material to finished product. Advanced anti‑corrosion coating systems allow our products to achieve long‑term performance in aggressive, wet environments.
Together with our engineering partners and local stock programs, we support EPC contractors, tank builders and operators from early design through installation and maintenance. Whether you are building a new bolted steel tank, expanding a wastewater plant or upgrading existing storage assets, Tank Bolt provides reliable fasteners, technical support and on‑time delivery to keep your project safe and on schedule.