... . size: m6-30x20-250mm 3. certificate:ISO9001:2000 4.finish:zinc, black, plain,H.D.G Cap Screw Gr2 gradestandardmaterialdiameterlengthsurface3.6 ... )H.D.G10.97.DIN79907.Q195 (E)CR3+zinc (B)ISO(B)Swrch35k (F)CR6+zinc 1.ISO4014C)45# (G)dacromet 2.ISO4017 ... .6,5.8,6.8,8.8,10.96)finish:zinc, black, plain,H.D.G7) material :Carbon Steel,swrch35k,45 ...