| 摘要 |
<p>A filler cap is provided comprising a flange having a handgrip, a stem of square shape for engagement in a square shaped opening in the tank. The stem is comprised of two sections rotated to each other by 45.degree. and connected by inclined surfaces. Once the first section of the stem is inserted into the tank opening it is sufficient to rotate the cap by 1/8 of a turn in order to lock it in a closed position.</p> |
