| 摘要 |
<p>The present invention provides a fastener which can be anchored in a hole, formed through a panel-like structure by applying the fastener to the hole exclusively from one side of said structure, said fastener comprising a shank divided longitudinally thereof into two parts, one of which is prismatic, the arrangement being such that insertion of the prismatic part into the hole, after the other part is already inserted into the hole, causes the shank to widen beyond the hole to anchor the shank against subsequent withdrawal.</p> |
