Hii

First of all congratulations for such a great score. You will hopefully be in the top percentile scoring students.
The cutoffs for NITs are not yet out so its not possible to exactly say about the admissions but yes as per previous year trends, you have a high chances of getting admission in NIT tirchy or warangal in mechanical branch.
Incase you need to know more about it you can use the following link
https://engineering.careers360.com/articles/jee-main-result
For any more query feel free to revert back.

Thanks!!