| 摘要 |
The present invention relates to a countersink washer which improves the loose prevention function of a countersunk bolt by adding a spring function to the countersink washer. The countersink washer is formed in a plate shape to receive the head part of the countersunk bolt and has a center hole, through which the bolt part of the countersunk bolt penetrates, and a cutting part which connects the center hole to the outside. |
