... bolt: 1Materials:Carbon steel 2Size:M30*100,150 3Finish:Black 4Certificate:ISO9001:2008,SGS Fasteners M30*100,150 black half thread hex head bolts ... Details of the product:1Materials: Carbon steel 2Size: M30*100,150 3Standard: AS, ASTM, DIN, JIS, GB, GOST, UNI, etc. ... :2. Various honorary certificates:3.product: M30*100,150 Black hex boltsM27*90,100,110,120 Black hex head bolts4. Factory view ...