Final answer:
Two full thread turns of engagement are required when installing an eyebolt or swivel hoist ring in a tapped hole application.
Step-by-step explanation:
When installing an eyebolt or swivel hoist ring in a tapped hole application, it is recommended to have two full thread turns of engagement. This means that the threads on the bolt should go at least two complete revolutions into the tapped hole. This provides sufficient thread engagement to ensure a secure and reliable connection.
Having the proper amount of thread engagement is important to prevent the bolt from pulling out or becoming loose under load. It also helps distribute the load evenly across the threads, reducing the risk of thread stripping or failure.
It's worth noting that the specific requirements for thread engagement may vary depending on the application and the specific design and strength requirements. It's always a good idea to consult the manufacturer's guidelines or engineering specifications for the specific eyebolt or swivel hoist ring being used.