| 摘要 |
<p>A cap for securement over the head of a fastener and wherein an annular dome-shaped cover is located under the fastener head to compress a flexible annular washer disposed about a fastener shank. The cap is molded of synthetic resinous material and has a hollow head portion and a cap attachment portion. The head portion has a top wall and an integral annular side wall. The attachment portion is formed integral with the annular side wall and is disposed circumferentially below the side wall. The attachment portion has an annular channel in an inner wall thereof for receiving in snap-fit engagement therein a circumferential flange of a fastener head to secure the cap over the fastener head. A circumferential shoulder portion is formed below the inner annular channel. An outwardly flared annular tapering skirt depends from the shoulder portion, and has a concave outwardly tapering inner wall defining a flexible lip. The skirt is of a length sufficiently long to receive thereunder the dome-shaped cover and flexible annular washer. The skirt is also thinner in thickness than the head portion and more resilient for greater flexibility.</p> |
