Hello,

For admissions to NITs/ IIITs/ GFTIs you need to have secured a minimum 75% marks in class XII or be in the top 20 percentile in their class XII exam conducted by the respective board. There's certain relaxation for SC/ST candidates, to have 65% minimum. But since you do not fulfill this basic requirement you are, unfortunate as it may sound, not eligible for Admission into these colleges. 

To find out other colleges that you can get with your JEE mains score visit the following link:

https://engineering.careers360.com/jee-main-college-predictor

All the best.