Casting and method of making such casting

摘要

A method of making a casting having a cast portion (20) and a cap nut (10) includes forming a hole (12) with a stepped shape in the cap nut to have a large-diameter hole (12b) on an opening side and a threaded small-diameter hole (12a) on a bottom side, inserting a fixing member (15) into the large-diameter hole, supporting the fixing member in a sand mold (17), pouring a casting material into the sand mold so that the cap nut is enveloped in the cast portion and that a first surface of the cap nut adjacent to the hole is exposed on a second surface of the cast portion, and removing the fixing member from the cap nut after the casting is taken out of the sand mold.