It will be difficult to get a seat in any NIT because the qualifying cutoff for this year for general category is predicted to be nearly 89%.For SC and ST category,the cutoffs predicted are 54% and 44% respectively.So if you belong to these categories,you will be able to qualify and have some decent chances to get an admission in NIT.But it is not not possible if you belong to OBC or General category.

To know about the previous year;s admission cutoff of various NITs for different categories,visit the below given website:

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