Leo Bolts Polished Stainless Steel Serrated Nuts, For Hardware Fitting, Size : Standard

Serrated flange nuts have a wide flange at one end that acts as a fixed, integrated washer, which helps distribute the pressure of the nut over the part being secured. The serrated surface on the underside of the flange provides a locking mechanism by angling into the substrate to keep the nut from rotating in the loosening direction.