Hi Dear,

Following are the best NITs in India for M. Tech in Mechanical Engineering:

• National Institute of technology Warangal.
• National Institute of technology Trichy.
• National Institute of technology Surathkal.
• National Institute of technology Calicut.
• National Institute of technology Allahabad.
• National Institute of technology Kurukshetra.
• National Institute of technology  Rourkela

Hope this helps.. Good Luck