Hello!!!

Hope you are doing great!!!!

The average cutoff percentile to get seat in NIT 's are around 96 or 97 percentile.The rank should be around 40000.But the cutoff may vary year to year.You can check top NIT's cutoff in various branches in the link provided:

https://engineering.careers360.com/articles/jee-main-cutoff-for-top-nits

hope it helps!!!!

Good luck!!!!