I have an Imperial thread, what is the closest in Metric?

One of our advanced tools. The Metric > Inch > Metric converter gives you 2 options to begin with, start off by you choosing either a metric or imperial fastener size and thread pitch, after selecting, the tool will display the closest matching result. To use effectively it helps if you know the fastener size, if you don’t, we also have other tools in this section to help identify sizes to help use this tool.

Converting between metric and inch fasteners forces you to make compromises. This converter gives you best proposals and will show you the differences in an easy way.