... 3.Certificate:ISO9001 Class 4.8/6.8/8.8/10.9/12.9 Carbon Steel Hex BoltWe are professional manufacturer ... m30,1/4''-1''4)length:10mm-250mm,1/2''--10''Detailed size description:A M6*16-50 M8*20- ... 4.8 ,5.6,5.8,6.8,8.8,10.9,12.96)finish:zinc, black, plain,H.D. ... ,BSF,UNC,UNF etc.9)certifications: ISO9001:200010)use: Our products are widely used in aerospace, automobiles, motorcycles, agricultural machinery, ...