I got 85.6 percentile in january main and i thinks i can get good percentile in april too.i am trying to get some good nit and i am sc cat.

If you're a SC student this percentile is enough for you to get admission into NITs though you might not get the core branches like CSE, ECE. But if you maintain a good percentile in mains april exam then you'll surely get a seat in too NITs that too in the branch of your choice. You need to wait for NTA to release the official cutoffs so that you can be more sure about the admissions.
Thank you.
Hope it helps.

Dear student

Please Clear that In which field you want to Go for B.Tech in NIT..After that we Can Give you answer that Which NIT will you may get.

Or You can follow the link In which all NIT cutoffs Are mentioned field wise..So You can check there..

https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-cutoff