machine and equipment screw grade standard material diameter length surface 3.6 (A)DIN (A)Carbon Steel m6-m30 10mm-250mm (A)zinc 4.6 1.DIN933 1.C1008 1/4''-1''' 1/2''--10'' 1.white zinc 4.8 2.DIN931 2.C1010 2.white and blue 5.6 3.DIN960 3.C1020 3.yellow zinc 5.8 4.DIN961 4.C1035 (B)plain 6.8 5.DIN558 5.C1045 C) Black 8.8 6.DIN601 6.Q235 D)H.D.G 10.9 7.DIN7990 7.Q195 (E)CR3+zinc (B)ISO (B)Swrch35k (F)CR6+zinc 1.ISO4014 C)45# (G)dacromet 2.ISO4017 (C)BS (D)ANSI/ASME 1.)size:m6-m30,1/4''-1'' 2.)length:10mm-250mm,1/2''--10'' 3grade:4.6,4.8 ,5.6,5.8,6.8,8.8,10.9 4)finish:zinc, black, plain,H.D.G 5) material :Carbon Steel,swrch35k,45# 6)thread;BSW,BSF,UNC,UNF etc. 7)certifications: ISO9001:2000, 8)Our products are widely used in aerospace, automobiles, motorcycles, agricultural machinery, construction, transportation, electric power, electronics, chemicals, and home appliances, military industry and other industries 9)packing: 50kg sacks in bulk, 20sacks/pallet25kg/carton,36cartons/pallet,50 kg sacks or 25kg carton lined with plastic bags+ strong wooden pallet AND at buyer's option 10)delivery lead time: 30days If you have any qustion,please feel free to contact me tel: +86-310-15176079498, +86-310-6889158 fax+86-310-6888669