The MS-B7 series bolt seals are used for securing truck trailers and cargo containers. These bolt seals are designed as a one-time use product which means once the seal has been locked it must be removed by destroying the seal. Each bolt seal features a unique laser engraved serial number on both the bolt shaft and the locking mechanism. The MS-B7 series bolt seals feature an anti-spin feature which provides added security to prevent un-authorized entry and tamper evidence. These bolt seals also feature a unique metal-on-metal interlocking mechanism for added cargo security. These seals are C-TPAT compliant and meet the new design and construction standards of ISO 17712:2013. With a longer bolt shaft and wider bolt head it accommodates a wider variety of truck trailer and cargo container doors and provides better access with bolt cutters for removal.