[bdcravens]

It's code to do so as of NEC 2017.

[Kirby64]

Only if the outlet provides torque specs with its instructions. If there's no specification, torquing isn't required. Stupid 'workaround', but most outlets likely do not have torque requirements.

[bdcravens]

Correct, though when I put the 240 in my garage, both the outlet and breaker had torque specs.