There is some risk of stripping occurring whenever bolts are tightened. Because of the thread design and materials used, bolt threads will rarely strip.
Bolts normally break before they strip.
Some nuts, however, may strip before breaking. Note that most of these nuts are actually manufactured with higher hardnesses than these values. Grade 2H should not strip because of their higher strength levels. Caution should be used to avoid stripping whenever tightening fasteners. When using the calibrated wrench method, the turns table limit should also be applied.