DIN439 Hex thin nut Material:Carbon Steel, AlloySteel, StainlessSteel, etc. Size:M3-M32 Hexagon head thin nut DIN439 Standard::DIN439-B DIN439-AName:hex jam nuts,hex thin nutsClass:CL4,CL5,6,8 Surface: Zinc Clear, Zinc Yellow, Zinc Black,Mechanical Galvanizing, Hot-dip Galvanizing,.etc. packing:Carton+Pallet or according to your special requirement