... i made by iron. 2.surface:nickel. 3.weld nut standard: SO,DIN,AISI,JIS or as your reques ... Item NameWeld Nut Special FastenersBrand NameZhongguMaterialCarbon steel, stainless steel, zinc alloy, aluminumStandardDIN, ... yellow zinc, black zinc, chrome plated.MOQ50000 piecesPayment TermT/T, Western Union Delivery Detail20~30daysPacking detailPlastic or poly bags ,then ...