NTRS will experience intermittent outages over night, July 14-15 due to system upgrades. Please contact our information desk, sti.nasa.gov/contact-us, for any questions. We apologize for any inconvenience and will update once the system is restored.
Locking Nut and BoltThreaded fastener locks parts securely together despite together large loosening torques, even under conditions of high temperature and vibration. Positive locking action is suitable for use where conventional fasteners tend to work loose--for example, on high-speed rotating machinery. Bolt, nut and key are joined together so key occupies alined slots in bolt and nut and prevents nut from rotating off bolt.