According to 2019 nit cut off marks for OBC qualifying mark is 74.31, for SC qualifying mark is 54.01, for ST qualifying mark is 44.33.

When the matter is about admission in nit colleges, if we have the qualifying mark then only we can get admission in nit colleges in round 1 or round 2 or round 3. As the round number increases, if there are vacancies, more students from higher ranks are also eligible to get admission.