1)Size:M3-M76 2)Material:Carbon Steel 3)Standard:ASME,ANSI,CE,MSS,JIS,DIN 4)Certification:ISO,API Fasteners sizeM3-M76Faceplain,zinc plated,black oxide,hot dip galv.etcMaterialCarbon Steel/Alloy Steel/Stainless SteelGrade4.6, 4.8, 5.6, 5.8,6.8, 8.8, 10.9 and 12.9standardDIN ,ANSI/ASME,BS,GB,JIS,etcpackingin wooded cases,or as to clients'requirements applicationused as the static sealing element ...