What is the term for damage that occurs from improper meshing of internal and external threads?

The term for damage that results from improper meshing of internal and external threads is referred to as cross threading. Cross threading occurs when the threads of a fastener do not align properly with the corresponding threads in a nut or hole, leading to misalignment and potential damage to both the fastener and the threaded component. This kind of damage often results in difficulty tightening or loosening the connection, can lead to a complete failure of the fastening, and may make it impossible to use the threaded part again without repair or replacement.

Understanding cross threading is crucial for any plumbing work that involves threaded connections, as it can compromise the integrity of the installation. Proper technique for aligning and engaging threads reduces the likelihood of cross threading, ensuring that connections are secure and reliable.