... :ASME,ANSI,CE,MSS,JIS,DIN 4)Certification:ISO,API Fasteners sizeM3-M76Faceplain,zinc plated,black oxide,hot dip galv.etcMaterialCarbon ... , 5.6, 5.8,6.8, 8.8, 10.9 and 12.9standardDIN ,ANSI/ASME,BS,GB,JIS,etcpackingin wooded cases ... of pipe ,value.pump,thermal exchange,condensing tower,plain hole and man hole of flange ,etcSpecial design available as the requirement ...