1)nut and bolt 2>Grade: Q235,202,304,316L 3>Finish: Zinc Plated 4>Thickness: 1.5-3.0mm 5>Size:41*41mm, ... 41*25mm NIut and bolt:Specifications:Material:35# 45# steel.40Cr.35Crmo. Finish:Black or zinc plated or HDG Standard:DIN931/933 ... steel3) Coating: plain, zinc, nickel, black .4)Packing: Boxes or Bulk ,Cartons on Pallet BOLT: (M6-M64), include hex bolt(DIN931,DIN933, DIN601, DIN558 ...