... such as GB,ISO.DIN.JIS,ANSI,BS,UNI,AS,etc and non-standard nuts;3.size range:Mm3-Mm36;4 ... zinc plating,blue zinc plating,environmental galvanizing,hot-dig-galvanizing,etc;8.manufacture method:be made by cold-forming & hot-forming ... .our main products include flat washer,spring washer,metal washer,etc;11.competive price for FOB or CIF;12.certification: quality ...