I have got 95 percentile in JEE Mains under OBC category. Is it possible for me to get admission in NITs for CSE?

First of all, I would like to congratulate your son for getting a very good percentile. A lot of efforts are required to get that much of percentile. To predict your son's rank and college please go through the link: https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=sh