What is the standard size of NPT threads?
Could you please clarify what you mean by "NPT threads"? Are you referring to the National Pipe Thread standard, which is a type of thread used for piping and fittings? If so, the standard size of NPT threads can vary depending on the specific size and class of the pipe or fitting. For example, a 1/2" NPT thread would have a different size and pitch than a 1" NPT thread. Additionally, the standard size may also vary based on the specific type of NPT thread, such as tapered or straight. Could you provide more context or specify which type and size of NPT thread you are inquiring about?