Hello Aspirant,

Don't worry even if you have not qualified JEE-Advance because still you have good chances for admission in to some NITs according to your JEE-Main rank under ST quota.

If we go through previous year's data of seat allotment On the basis of data mentioned in the question by you, you can go for the enlisted colleges :-

National Institute of Technology Calicut

Maulana Azad National Institute of Technology Bhopal

Dr. B R Ambedkar National Institute of Technology, Jalandhar

National Institute of Technology Agartala

And some more. You can check out previous year's cut-offs from the official website of JOSAA as given below :-

https://josaa.nic.in/Result/Result/currentorcr.aspx

Note that the above list is merely a prediction which has been made on the basis of latest cut-offs available on official website of either JOSAA or CSAB and the cut-offs are bound to change every year depending upon various factors such as the number of candidates appearing in an examination, the number of candidates qualifying an examination, difficulty level of the paper, and so on.

So you can use JEE-Main College Predictor to predict your chances of admission in different engineering colleges of India on the basis of your JEE-Main 2021 result :-

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

For your reference, you can check out the link given below to have better idea :-

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

I hope this information helps you.

Good Luck for your future!!