... 9001 2008) We can produce high quality bolt and nut per customer's requirements. The feature ... produce 1/2-6” M12-M160 high-strength bolts, nuts and screws in accordance with GB, ANSI, DIN, EN, RCCM ... -2007, JIS, ISO, SH, HG, JB, GD and GJB ... With powerful technical strength, complete equipment, superior quality and fine after-sales service, the company has been ...