- Ningbo Zhongli bolts manufacturing Co., Ltd. +86-574-86587617
- tan@nbzyl.com
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Ningbo Zhongli Bolts Manufacturing Co., Ltd. founded in 2003, is a professional manufacturer of high-strength fasteners in different specifications for various models, which is covering an area of about 10,000 square meters, registered capital of 1500,000 RMB, with the total annual productivity of 8,000 tons per year. The company has set up several sales branches in different provinces in China. Meanwhile, the company's products are exported to Europe, USA, Middle East, Africa, Southeast Asia and other regions. The company has strong technical ability, complete testing equipments and a variety of fully automatic multi-station cold and hot heading machines, so as to provide you with reliable and high quality products.
Our main products ZYL brand fasteners include structural hex bolts ASTM A325 type 1, A490, hex head bolts DIN931, DIN933, EN14399, DIN6914, ISO4014, ISO4017 Gr8.8 Gr10.9 Gr12.9, ANSI B18.2.1 UNC and UNF Gr5, Gr8, fine pitch hex bolts DIN960, DIN961 Gr8.8 Gr10.9 Gr12.9, hex socket cap screws DIN912, ISO4762 Gr8.8 Gr10.9 Gr12.9 with surface Black, Zinc plated, Hot dip galvanized. Diameters from M10 to M48, length no limited. Hex Flange bolts DIN6921 Gr8.8 Gr10.9 with serration, thread rod A193 B7 long sizes and short sizes with 2H nuts, stud bolts. We also can supply hex nuts DIN934, DIN6915, plain washers DIN125, DIN126, DIN6916, spring washers DIN127 with Black, Zinc plated and Hot dip galvanized surface.
Our physical and mechanical test results can reach to ISO898-1 for bolts and ISO898-2 for nuts. Through scientific management, Ningbo Zhongli Bolts Manufacturing Co., Ltd. obtained ISO9001 certificate of Quality Management System. Quality is the most important for us. We have strict production and inspection equipments to support this point. We hope to establish business relationship with all over the world, and our business can bring in mutual benefits for both parties.
In the realm of modern civil engineering and architecture, the structural integrity of any building is only as reliable as its smallest components. Among these, the hex bolt for construction stands out as a fundamental element. Used to secure heavy structural steel, anchor machinery, and connect massive precast concrete sections, these fasteners are engineered to handle immense tension, shear, and torque. Understanding the deep application scenarios, industrial status, and upcoming trends in the structural fastener market is crucial for modern B2B procurement managers and structural engineers alike.
"High-strength hex bolts (such as ASTM A325, A490, and EN 14399 standards) are not merely fasteners; they are active load-bearing elements designed to distribute stress and prevent catastrophic joint failure under dynamic seismic and environmental loads."
Hex bolts designed specifically for construction are deployed across a wide range of demanding environments, each requiring distinct mechanical properties and surface coatings:
The global construction fastener market is experiencing robust growth, driven by massive urbanization, infrastructure renovation projects in developed nations, and extensive industrial expansion in developing regions. In this context, China has emerged as a major global hub for wholesale construction fasteners. Manufacturers like Ningbo Zhongli Bolts Manufacturing Co., Ltd. leverage advanced cold and hot forging technologies to meet international standards such as DIN, ANSI, GB, and ISO, supplying high-quality products at competitive price points.
Procurement strategies have also evolved. Modern construction buyers no longer look solely at unit price. Instead, the focus has shifted to the Total Cost of Ownership (TCO), which includes fastener reliability, anti-corrosion longevity, and compliance with local building codes (such as CE certification for European markets). High-strength fasteners with advanced coatings (such as zinc-nickel or hot-dip galvanization) reduce maintenance cycles and overall structural lifecycle costs.
As the construction industry embraces digital transformation and sustainable development, the fastener manufacturing sector is adapting with several key innovations:
A Professional Sales and Technical Team with More Than 20 Years History.
We Have Our Own Testing Equipment and Laboratory, Our Products Have Initial Inspection, Patrol Inspection, And Final Inspection.
Our Factory Has Its Own Cold Forged, Hot Forged, And Heat Treatment Equipment.
Standard Fasteners in Stock, Non-standard Fasteners Can Be Customized.
We Have Passed ISO 9001, EN 15048, EN 14399, AD2000 and CE Certificates.
At Ningbo Zhongli Bolts, quality control is integrated into every step of our manufacturing workflow. We understand that in construction projects, a single bolt failure can compromise an entire structure. Therefore, we utilize advanced laboratory equipment to verify the geometric tolerances and mechanical capabilities of our products.
Ningbo Zhongli Bolts Manufacturing is certified to meet international standards for safety, performance, and environmental compliance: EN 15048 CE Certification, EN 14399 CE Certification, and ISO9001 Quality Management System.
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