hex head bolt: 1Materials:Carbon steel 2Size:M30*100 3Finish:Black 4Certificate:ISO9001:2008,SGS Fasteners M30*100 black half thread hex bolts ... Details of the product:1Materials: Carbon steel 2Size: M30*100 3Standard: AS, ASTM, DIN, JIS, GB, GOST, UNI, etc ... on.Pictures:1.certificate:2. Various honorary certificates:3.product:M30*100 black half thread hex boltsM30*100,150 Black hex ...