Dear candidate

Yes you will have a chance to get into some NITs for few branches but not sure because in general a person should get 97 percent inorder to make sure he get NITs but you have SC reservation so you will have a chance to get into NITs

To explore the previous year cutoff trends of NITs with different Institute, branch and category, state quota and gender

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

Visit the below mentioned link to predict how many colleges you can get with 86 percentile with your respective category

Hope this Information is helpful