HEX BOLTS STANDARD:DIN931/933 DIN558/601 DIN7990/6914 BS916 ASME A325/A490 ISO4014 GRADE:4.8,8.8,10.9,12.9 HEX BOLTSSTANDARD:DIN931/933 DIN558/601 DIN7990/6914 BS916 ASME A325/A490 ISO4014GRADE:4.8,8.8,10.9,12.9FINISH:PLAIN,BLACK HOT DIPPED GALVANIZED ZINC PLATED,SHERARDIZED ELECTRIC ZINC fasteners