staybolt

noun1

1. •
   A rod with threaded ends, used as a stay in a boiler, firebox etc.

   • Code of Federal Regulations, ProStar Publications →ISBN (no publication date given)https://books.google.co.uk/books?id=mLdukh4tXdcC&pg=PA477&lpg=PA477&dq=%22staybolts%22&source=bl&ots=2m6CqRS0M0&sig=BIoUcN1TYS7S3IhFTAQEekhkKoU&hl=no&sa=X&ved=2ahUKEwj54s77zp_dAhVpCcAKHRsrC2Y4ChDoATADegQIBxAB#v=onepage&q=%22staybolts%22&f=false At the time of replacement of broken staybolts, adjacent staybolts shall be inspected.