... m6-30x20-250mm 3. certificate:ISO9001:2000 4. grade: 3.6,4.6, 4.8, 5.6,5.8, bolt screw bolt screwgradestandardmaterialdiameterlengthsurfacepackagepaymentMOQ3 ... standard :DIN,BS, ANSI, ISO, GB3)size:m6-m30,1/4''-1''4)length:10mm-250mm,1/ ... 90-270 M30*90-3005)grade:4.6,4.8 ,5.6,5.8,6.8,8.8,10.96)finish:zinc, ... black, plain,H.D.G7) material :Carbon Steel,swrch35k,45#8 ...