Copper NPT Thread Nicks

[dlipter]

Have some Nibco 604 3/4" copper NPT Male Adapters. Upon close inspection, I see some small nicks in the threaded portion. How perfect must the threads be to prevent leaks? Will the threads cold form and seal, correcting any small thread flaws?

Thanks

 

[phishfood]

If they are small, use some pipe thread sealant and wrench tighten them into a female fitting. Then remove them, use your normal method of thread sealant, and final assembly. Small nicks should be fine if you do this to properly "clean" the threads.