The high-strength bolts produced by our company are made of high-quality alloy steel. Through the heat treatment process of normalizing, quenching and tempering, the mechanical properties of the bolts are guaranteed. They are widely used in the fields of marine equipment, wind power, petrochemical industry and engineering machinery. The products comply with GB, DIN, ISO, ANSI / ASME, JIS and other international standards, and can provide ABS, DNV-GL, CCS, SGS and other product certification. We