Square Nut Ss304 Jiaxing Zhongren Metal Co., Ltd Base Info Model NO.：JBSN-038Material：Carbon SteelType：Square HeadConnection：Common BoltHead Style：SquareStandard：DIN, ANSI, GB, BSWGrade：4.8 Description Pre：Rhombus Spring Nut Yzp Next：Stainless Steel Air Coupling Hose Fittings
