Hey there as per your jee mains in sc category ranking and according to this year cut off you can apply for the following Nits in following barnches 

NIT SRINAGAR chemical(11290) ,Meturgicall(12426)

NIT MIZORAM chemical,Mechanical

But the chances are less in these nit also but you can go for iiits and gftis .

Hello aspirant,

Congratulations for the results. NIT's are the second topmost government technical institutes of India and admission in this college depends on various factors such as category, home state quota ,branch , etc. Also there are very less chances of getting admission in NIT's you can go through the previous years cutoff for the clear understanding

Link- https://engineering.careers360.com/articles/nits-cutoff-for-top-btech-branches

Hope this helps

If any queries feel free to ask

All the best!!

Regards