4.8 bolt: 1Materials:Carbon steel 2Size:M27*120,M30*100 ... Black 4Certificate:ISO9001:2008,SGS Fasteners M27 M30Hex head Gr4.8 bolts Details of the product:1Materials: Carbon steel 2Size ... AS, ASTM, DIN, JIS, GB, GOST, UNI, etc. 4Grade: 4.85Surface: Black, (Darconmet, HDG, Zinc plated, etc.)6Proven technique & good ... .product:M27*120,M30*100,130 Hex head Gr4.8 boltM30*100,150 Black hex boltsM27*90,100,110 ...