Back Home / Fasteners / Nuts / HEX FLANGE NUT ZINC 1/2″-13 SERRATED HEX FLANGE NUT ZINC 1/2″-13 SERRATED SKU: XFN1213 Categories: Fasteners, Nuts The flange serves to distribute the pressure of the nut over the part being secured. Less likely to loosen as a result of an uneven fastening surface. Serrated. Grade A case hardened. Size: 1/2″-13″. Case Quantity: 50 Log In For Pricing