... 41*25mm NIut and bolt:Specifications:Material:35# 45# steel.40Cr.35Crmo. Finish:Black or zinc plated or HDG Standard:DIN931 ... Coating: plain, zinc, nickel, black .4)Packing: Boxes or Bulk ,Cartons on Pallet BOLT: (M6-M64), include hex bolt ... , expansion bolt(ANSI,BS,DIN), eye bolt (DIN444) and so on. NUT:(M12-45), include spring nut, hex ... hex flange nuts(DIN6923), hex slotted nuts(DIN935) and so on.