... metallurgy,power,pipelineaccessories etc5.Grade:8.8,9.8,10.9,12.96.Standard:DIN,ANSI/ASME,BS,GB,JIS,non- ... standard(DIN933,DIN931,DIN934 etc or BS917 etc or ASME B18 ... power,pipelineaccessories etc5.Grade:8.8,9.8,10.9,12.9 6.Standard:DIN,ANSI/ASME,BS,GB,JIS,non ... standard(DIN933,DIN931,DIN934 etc or BS917 etc or ASME B18.2.1 etc)7.Surface:Plain,zinc plated, ...