DIN557 Square Nuts Hangzhou Huachao Fastener Co., Ltd. Base Info Material:Carbon SteelType:DIN557 Square NutsConnection:Common BoltHead Style:HexagonalStandard:DIN, ANSI, GB, JIS, GOST, BSWGrade:8.8Trademark:HANGCHAOOrigin:P. R. CHS Code:73181600 Description Pre:DIN6923 Hexagon Flange Nuts Next:DIN982 Nylon Insert Nut