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The flange bolts can be manufactured in the standard of ASTM, ANSI/ASME, JIS, DIN, GB/T and ISO.
The strength class ranges from 4.8 to 12.9 and the property grade of the steel structure ranges from 8.8S to 12.9S.
We manufacture both of flange bolts and flange nuts. According to customers' requirements the bolts'surface can be dacrotized, zinc plated, phosphotizated or just plain.
We've got the certificates of ISO14001:2004, ISO9001:2000 and ISO16949:2002. We asure you the high quality and perfect service and look forward to your initial inquiry.