I secured 80 percentile in mains paper 2 can I get allotment in NITs

Hello,
Your score is quite decent, since you haven't mentioned your category, so it is difficult to know the possibilities. But for an assumption you need to score around 85 percentile.
According to your score your rank would be around 30 thousand.
You can also check fof the different colleges cutoff which is below provided.

https://engineering.careers360.com/articles/jee-main-cutoff-for-b-arch-b-planning.
ALL THE BEST!!
For any further queries you can ask me.

Hello aspirant,
You got good percentile but it is not enough to get into good colleges.The expected rank for your percentile is calculated based on the formula:
Rank=(100- NTA percentile)*145386/100.
Your expected rank may be 29,077(approximately).
This rank may vary after the official results which will be released in the month of April.
So please wait for the official cut offs and prepare well for the exam.
Here I will provide you the link of the previous year nit cut offs.
http://www.google.co.in/amp/s/engineering.careers360.com/articles/jee-main-cutoff
Hope you understood and if you have any questions please contact us.
Thank you!!