Hi ! Yes you can get a seat in nit with your ews rank category. It is so because this percentile in ews rank category will count the rank upto1000-3000, depending on cut-off and vacancy. So you can have 2nd and third tier nit in hand. For 1st tier and 2nd tier you will get low level branches. And in third tier nits you will get good streams. So hope you understand and best of luck to you. Given below a link will be useful to you.

https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/jee-main-college-predictor&ved=2ahUKEwi38aObx-jiAhVCfSsKHfkKD8YQFjABegQIBhAB&usg=AOvVaw1pTMu5LewXe0n3JPiA8V2U