The main standards of hex bolts are ANSI, DIN, BS and ISO. Diameter of the hex bolts is 1/4¡±-1¡± with tensile strength Gr2-Gr8, and M6-M30 for the metric products covering the tensile strength Gr4.8-Gr10.9. Surface treatment are including black, zinc plated, hot dip galvanized, phosphated Ect. The products are mainly for machinery manufacturing, projects maintaining, construction, bridge, and Auto industry. |