- Ningbo Zhongli bolts manufacturing Co., Ltd. +86-574-86587617
- tan@nbzyl.com
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Our most-demanded structural bolt solutions for Bulgarian construction and industrial projects — engineered to international standards with full traceability.
Ningbo Zhongli Bolts Manufacturing Co., Ltd., founded in 2003, is a professional manufacturer of high-strength fasteners in different specifications for various models. Covering an area of about 10,000 square meters with a registered capital of 1,500,000 RMB and a total annual productivity of 8,000 tons per year, the company has established several sales branches across China.
Our products are exported to Europe, the USA, the Middle East, Africa, Southeast Asia and other regions — including an expanding presence in the Bulgarian market. With strong technical capabilities, complete testing equipment, and a variety of fully automatic multi-station cold and hot heading machines, we deliver reliable, high-quality fasteners to global clients.
20+ Years of Manufacturing Excellence — ISO9001, EN15048, EN14399, AD2000 & CE Certified. Trusted by Bulgarian distributors and contractors.
Bulgaria's construction and industrial sectors are experiencing significant growth, driven by EU-funded infrastructure projects, urban development, and manufacturing expansion. Structural bolts are a critical component across all these sectors.
Bulgaria's construction sector benefits from substantial EU Cohesion Fund investments. High-strength structural bolts compliant with EN14399 and DIN standards are essential for steel-frame buildings, commercial complexes, and residential towers in Sofia, Plovdiv, and Varna.
Major road and bridge rehabilitation programs under Bulgaria's National Recovery Plan demand ASTM A325 and A490 structural bolts for high-load steel connections. Our M48 heavy hex bolts are widely used in Bulgarian bridge construction and highway overpasses.
Bulgaria's growing manufacturing base — including automotive components, food processing, and chemical plants — relies on DIN931/933 grade 8.8 and 10.9 hex bolts for machinery assembly, equipment mounting, and structural steel frameworks.
Wind farms along the Black Sea coast and solar installations across southern Bulgaria require corrosion-resistant structural bolts with hot-dip galvanized or zinc-plated finishes. Our stud bolts A193 B7 and hex flange bolts DIN6921 are ideal for these demanding environments.
Bulgaria's railway modernization program, connecting Sofia to the Trans-European Transport Network (TEN-T), demands precision-engineered structural fasteners meeting strict EN standards for rail track assemblies and station structures.
Bulgaria serves as a regional distribution hub for the Balkans. Local fastener wholesalers and hardware distributors in Sofia and Plovdiv source structural bolts in bulk from certified Chinese manufacturers, benefiting from competitive pricing and reliable supply chains.
The Bulgarian fastener market is evolving rapidly. Here are the key trends shaping demand for structural bolts in 2024 and beyond.
As Bulgaria aligns its construction standards with EU directives, demand for structural bolts meeting EN14399 and EN15048 specifications is accelerating. Contractors and engineers are increasingly specifying CE-marked fasteners for public infrastructure projects, creating strong demand for certified suppliers like Zhongli Bolts.
Bulgaria's commitment to EU Green Deal objectives is driving adoption of sustainable construction practices. Hot-dip galvanized structural bolts with extended service life are preferred for green-certified buildings, reducing maintenance costs and environmental impact over the structure's lifetime.
The prefabricated steel construction market in Bulgaria is expanding rapidly, particularly for logistics warehouses, industrial halls, and commercial buildings. This trend directly increases demand for high-volume supplies of DIN931/933 and ISO4014/4017 hex bolts in grades 8.8 and 10.9.
Bulgarian industrial buyers are increasingly using digital platforms and B2B portals to source structural fasteners directly from Chinese manufacturers, bypassing traditional intermediaries. This shift enables better pricing, faster specification matching, and full material traceability documentation.
Specialized Bulgarian engineering projects increasingly require non-standard bolt dimensions, custom surface treatments, or unique material grades. Manufacturers capable of producing custom structural bolts — from M10 to M48 with unlimited length — hold a significant competitive advantage in this niche.
Our main 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 unlimited. Hex Flange bolts DIN6921 Gr8.8 Gr10.9 with serration, thread rod A193 B7 long and short sizes with 2H nuts, stud bolts. We also 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 meet ISO898-1 for bolts and ISO898-2 for nuts. Through scientific management, Ningbo Zhongli Bolts Manufacturing Co., Ltd. has obtained ISO9001 Quality Management System certification. We maintain strict production and inspection processes to guarantee every bolt delivered to Bulgarian customers meets the highest quality standards.
Full Range Available: M10–M48 Structural Bolts · Unlimited Length · Black / Zinc Plated / Hot-Dip Galvanized · Custom Specifications Welcome for Bulgarian Projects
Every structural bolt destined for Bulgaria passes through our rigorous 8-stage manufacturing process — from certified raw material to sealed container.
Our 10,000 sqm manufacturing facility is equipped with fully automatic multi-station cold and hot heading machines, ensuring precision and consistency for every structural bolt order.
A Professional Sales and Technical Team with More Than 20 Years of History serving global markets including Bulgaria.
We have our own testing equipment and laboratory. Products undergo Initial Inspection, Patrol Inspection, and Final Inspection.
Our factory has its own Cold Forged, Hot Forged, and Heat Treatment equipment for full in-house production control.
Standard fasteners in stock; non-standard fasteners can be customized to meet specific Bulgarian project requirements.
We have passed ISO9001, EN15048, EN14399, AD2000 and CE Certificates — fully compliant with EU market requirements.
We hope to establish long-term business relationships with partners across Bulgaria and the wider Balkans region. Our service brings mutual benefits to both parties.
Every structural bolt is rigorously tested before shipment to Bulgarian customers. Our in-house laboratory ensures full compliance with international and EU standards.
EN 15048 CE Certification · EN14399 CE Certification · ISO9001 Certificate — Fully compliant for EU and Bulgarian market requirements.
Grasp first-hand information — what our global customers, including Bulgarian distributors, say about Zhongli Bolts.
Explore our full range of high-strength structural bolts and fasteners — all available for wholesale supply to Bulgarian buyers and distributors.
Contact Ningbo Zhongli Bolts today for competitive wholesale pricing, free samples, and full technical support for your Bulgarian construction or industrial project.
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