Yes definitely you can get a seat in National Institute of Technology in Mechanical or EC branch. The name of NITs you can get in Mechanical branch based on your score is mentioned below. 

• National Institute of Technology Hamirpur
• National Institute of Technology Raipur
• National Institute of Technology Patna
• National Institute of Technology, Andhra Pradesh
• National Institute of Technology, Uttarakhand
• National Institute of Technology, Silchar

Hope this may help you. 

Hey Abhishek please tell me that 19128 rank is it in general or in sc 

if it is in sc category then I am sure that you will not get any college through IIIT or NIT.

It changes from time to time depending on the topper's marks .

Also it depends which NIT you want , you can get NIT with marks 60–70 range and also with 170–180 marks.

To get admission in high ranked NITs you gotta score high marks irrespective of having category benefit like score marks( 200–225). For other NITs you can also get admission with score of (75–100).

Choose particular NIT you wish to go and choose branch , then target and try to score good marks leaving the thought you can get admission with low marks .