| 摘要 |
<p>A bolt seal for securing hasps on trailer truck doors and/or rail car doors which utilizes a round or oval head bolt which extends through the hasps and upon which a nut is threaded. The nut is threaded onto the bolt until it is tight and then a hollow tube is used to bend the bolt sharply to about 90 DEG just under the nut. Identification number areas are formed at the tail of the bolt and on a flat portion of the bolt adjacent the head. If a thief tries to break the seal by bending the bolt back to its original straight condition, the metallurgy of the bolt is selected so that the bolt breaks off. This indicates that the seal has been tampered with and furthermore, the thief finds that if he tries to turn the nut the round head of the bolt will rotate and since the threads are upset by the bending he will be unable to remove the nut. A modification of the invention utilizes a spin nut which is cylindrical in shape.</p> |
