YM Structural Bolts

Ningbo Yuema Fastener Co., Ltd. established in 2012, which located in Ningbo, Zhejiang, operates as a private manufacturing enterprise with a streamlined organizational structure.
The company is divided into functional departments including Production, Quality Control, Research & Development (R&D), Sales, and Customer Service.
As a high-tech enterprise, it emphasizes innovation and compliance with international standards, supported by a dedicated technical team focusing on high-strength structural fasteners.
We specialize in manufacturing hex heavy structural bolts, transmission tower bolts, wind tower bolts and anti-theft tower bolts for global infrastructure projects.
Certification: Compliance with international standards (such as ASTM, DIN, JIS) and the ISO 9001 quality management system, ISO14001, ISO45001.
In addition, passed the certifications of EN 15048 and EN 14399 for structural bolt assemblies used in steel construction.
Manufacturing capabilities: Advanced Equipment: Automated cold heading machines, hot forging lines, heat treatment lines, and precision testing equipment to ensure product quality.
Our in-house lab performs tensile test, hardness test, salt spray test and dimension inspection for every batch of fasteners before shipment.
R&D Center: Dedicated to developing high-strength fasteners for industries like power transmission, wind energy, construction, oil & gas, and infrastructure.
We accept custom fastener solutions according to client drawings, including special material grades and hot-dip galvanized surface treatment.
Annual Capacity: Produces over 20,000 tons of fasteners, including hex bolts, anchor bolts, threaded rods, nuts and washers, etc.
With convenient Ningbo port logistics, we deliver fast and reliable shipment to customers across Europe, Southeast Asia, Latin America and other global markets.
Our sales and technical team provide full after-sales support, including technical consultation, project quotation and on-site engineering guidance.