Fastening system allowing component removal after fastener system failure

摘要

A fastening system for attaching a cover to an underground vault having a bolt with threads and a composite fiber reinforced polymer nut having a thread engagement portion extending through the nut which will fail in shear after the bolt is inserted before the nut and bolt seize. The fastening system can also include a nut retainer sized to allow the nut to float within the retainer. Sheet -2/5 4 0 -,3 6 2 8 26r 38 42 22-4 Sheet 4/5