- Ningbo Zhongli bolts manufacturing Co., Ltd. +86-574-86587617
- tan@nbzyl.com
Leave Your Message
Explore our top-tier hexagonal head bolts, meticulously manufactured to meet the rigorous demands of California's industrial and construction sectors.
San Francisco's unique geographical location demands unparalleled structural integrity. The Bay Area's stringent seismic building codes require fasteners that can withstand extreme dynamic loads. As a leading Hexagonal Head Bolt Manufacturer, we supply ASTM A325 and A490 structural bolts critical for earthquake retrofitting, commercial skyscrapers in the Financial District, and ongoing maintenance of iconic structures like the Golden Gate Bridge.
Just south of San Francisco, the tech hub of Silicon Valley requires massive data center expansions. Our high-tensile DIN912 and ISO4762 hex socket cap screws are extensively utilized in assembling heavy-duty server racks, cooling systems, and structural framing. The technology sector demands precision, and our automated, AI-monitored manufacturing ensures zero-defect tolerances for these mission-critical environments.
The corrosive saltwater environment of the San Francisco Bay necessitates superior surface treatments. We provide Hot Dip Galvanized and specialized Zinc-plated hex bolts designed to resist oxidation and marine corrosion. From the Port of Oakland's logistics infrastructure to San Francisco's waterfront developments, our fasteners offer the longevity and reliability required for coastal engineering.
The fastener industry is rapidly evolving, and San Francisco's local businesses are increasingly demanding smarter, more traceable supply chains. The trend is shifting towards AI-driven defect detection and automated metallurgical analysis. At our production facilities, we integrate intelligent sensors during the cold and hot heading processes, ensuring that every Gr8.8, Gr10.9, and Gr12.9 hex bolt meets ISO898-1 standards before it ever ships to California. This technological leap guarantees that our partners in the Bay Area receive structural components that exceed modern safety regulations.
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.
Read More About Us
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.
Our high-strength fasteners are produced in state-of-the-art facilities, ready to be deployed in major San Francisco Bay Area infrastructure projects, from bridge maintenance to commercial high-rises.
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 hope to establish business relationship with all over the world, and our business can bring in mutual benefits for both parties.
EN 15048 CE Certification, EN14399 CE Certification, ISO9001 Certificate, Ad2000
Grasp first-hand information from our global partners.
Discover our full range of OEM and wholesale fasteners, engineered for high-tensile strength and durability.
Send Email
