| 摘要 |
A fastener assembly comprises a sleeve (12) retained against a substrate by means of a fastener (14) driven into the substrate by a power actuated tool. The sleeve includes an integral internal column (18) projecting rearwardly from the forward end (20) of the sleeve and through which the fastener extends. The column is engaged by the head (38) of the fastener and is progressively collapsed by the head in order to decelerate the fastener. |
