Tutorial on modeling Unified screw thread on bolt in SolidWorks.
Here is the tutorial.
Answered with a tutorial: https://grabcad.com/tutorials/tutorial-modeling-unified-screw-threads-on-bolt-in-solidworks
sudhir friend if the thread pitch is 3mm, I know because that curve 1 mm diameter and rather than be a rounding triagulo you applied it. the only thing that I did not understand step 20
awesome , thanks alot !