FUEL CAP

摘要

A fuel cap comprises a cap body, a flange member projecting outward in radial direction on upper side of the cap body, and a weak portion which is easily broken and provided at the flange member and enables separation of the flange member from the cap body. The weak portion is formed by a plurality of V-like grooves at upper surface side which are formed on the upper surface of the flange member in concentric relation and a plurality of V-like grooves at lower surface side which are formed on the lower surface of the flange member in concentric relation and adjacent to the V-like grooves at upper surface side.