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Topbolt is a trusted Chinese manufacturer with over 20 years of experience producing high-strength fasteners conforming to DIN, ISO, ASTM, ANSI, BS, JIS, and GB standards. Specializing in bolts, nuts, washers, threaded rods, and custom hardware solutions.
Ningbo Topbolt Metalworks Co., Ltd. is a professional manufacturer in China specializing in high-strength fasteners and all kinds of hardware products. Founded in 2001, the company has grown rapidly with its production base located in the Ningbo Zhenhai Chemical Industrial Area and its headquarters and foreign sales department in Ningbo Jiangdong Eastern Business Centre.
Our factory covers an area of approximately 15,000 square meters, with a monthly production capacity of 2,000 tons. We maintain a comprehensive research system, efficient supply chain management, and large-scale warehousing to ensure timely delivery and consistent quality.
Precision-engineered fasteners meeting international standards for strength, durability, and reliability across industries.
High-strength bolts conforming to DIN, ISO, ASTM, ANSI, BS, JIS standards.
Long-length threaded rods for structural and mechanical applications.
Wide range of nut types for secure fastening solutions.
Flat and spring washers for load distribution and vibration resistance.
Tailored solutions based on customer drawings or samples.
Hardware components for precast concrete construction.
High-strength alloy steel threaded rods for high-temperature service.
Comprehensive range meeting multiple international standards.
Advanced manufacturing and quality assurance systems ensure precision and consistency.
15,000㎡ facility with automated production lines and 2,000 tons monthly capacity. Full in-house control from raw material to finished product.
Rigorous testing for tensile strength, hardness, coating thickness, and dimensional accuracy. Full traceability and certification available.
Products conform to DIN, ISO, ASTM, ANSI, BS, JIS, and GB specifications. Trusted by clients across North America, Europe, Asia, and the Middle East.
Carbon steel, alloy steel, and stainless steel fasteners. Custom material selection based on environmental and mechanical requirements.
Capable of producing custom fasteners based on customer drawings, samples, or specifications. Rapid prototyping and tooling development.
Large-scale warehousing and efficient supply chain management ensure on-time delivery worldwide. Flexible packaging and labeling options.
Our fasteners are trusted in critical applications across diverse sectors.
High-strength bolts and fasteners for commercial buildings, industrial facilities, and large-span structures.
Reliable connections for bridge construction and maintenance, meeting strict safety and durability standards.
Corrosion-resistant fasteners for marine environments, including vessels and offshore platforms.
Mounting hardware and structural fasteners for solar panel installations and renewable energy systems.
High-pressure and high-temperature fasteners for refineries, pipelines, and petrochemical plants.
Durable fastening systems for rail tracks, signaling, and rolling stock applications.
Products conform to DIN, ISO, ASTM, ANSI, BS, JIS, and GB standards with full documentation.
2,000-ton monthly capacity and efficient logistics ensure on-time shipments worldwide.
Capable of producing fasteners based on your drawings, samples, or unique specifications.
Ready to discuss your fastener needs? Contact Topbolt today for expert support and competitive pricing.
Explore our full product catalog, request a quote, or connect with our sales team directly through our official website.
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