Hebei Longze is the premier manufacturer of heavy-duty fastening systems. We translate complex mechanical standards into absolute structural integrity for automated assembly, wind energy, and global infrastructure.
We don't just forge steel. We manufacture trust through data-driven quality control and advanced metallurgical engineering.
Mandatory 200°C+ hydrogen embrittlement baking for 10.9/12.9 class fasteners. 100% thread gauge verification before dispatch.
In-house NSS Salt Spray testing. Delivering Geomet, Dacromet, and Zinc-Nickel coatings achieving 1000h+ corrosion resistance for offshore environments.
Precision tolerance control (+0.1/-0mm) and automated optical sorting guarantee zero-jamming performance on high-speed robotic assembly lines.
Browse our complete inventory matrix. Hex bolts, nuts, washers, and structural components manufactured strictly to DIN, ISO, and ASME standards.
Access our technical whitepapers, dimensional matrices, equivalent mappings (DIN to ISO), and advanced coating specifications.