Duplex Bulge Acorn Stainless Steel Nut (19297) Yangzhou Haina Auto Parts Manufacturing Co., Ltd. Base Info Model NO.:19297Material:Carbon SteelType:Pan HeadHead Style:HexagonalStandard:GBGrade:8.8Origin:China Description Pre:Precision Casting Valve Next:Duplex Bulege Acorn Stainless Steel Capped Nut (19332)