Item NameISO 4762 Hexagon socket head cap screwsClassScrew,nut,bolt,washer,thread rod,etc.Material GradeGR1、GR2、GR3、GR4、GR5、GR7、GR11、GR12、GR23;StandardISO 4762,DIN912,JISB1176-,GB/T70.1,ANSIB18.3.1MDimensionM12*70SurfacePolishing, Anodizing, Black oxide,ColoredPackingWooden CaseApplicationChemical, Industry, Petroleum, Aircraft