Hex Nylon Nuts Wenzhou Jianhong Machinery Co., Ltd. Base Info Material:Mild Steel,Medium Carbon Steel.Type:Hexagon HeadHead Style:HexagonalStandard:DIN985 DIN982 ANSI Bs,or According to Customer′s DGrade:4,6,8 Description Pre:Stainless Steel Union--Liner 5 Next:Retaining Ring DIN471