Product Description

We produce the heavy hex bolts with different size, material and strength grade. Size ranges from M**-M*0, material is in *0MnTiB, *5Cr, *0Cr, *0CrMnSi and *5MnVB and the strength grade is classified by 8.8, *0.9 and *2.9. The surface treatment is also available by blue/white zinc, multicolored, the Dacromet treatment and black zinc. Products can be manufactured in compliance with different international standards, such as: GB/T*******3, Germany DIN ISO***1:****9, France NF ISO***1:***9, Japan JIS B **********1, Russia GOST********2, America ASTM B 1.*3M****2, British BS ISO***1:***8 as well as ISO standard. The heavy hex bolts is widely used in railway, bridge, boiler, steel structure, hoisting machine and other large size of steel structure project.