True or False: Interference and transition fits distribute shear forces around their entire surfaces.

The statement is true because both interference and transition fits are designed to create a specific level of tightness between two mating parts, which allows for efficient load transfer. In these types of fits, the geometry of the components ensures that shear forces are distributed over the entire contact surface rather than concentrated in one area. This uniform distribution is critical in maintaining the integrity of the assembly under load, reducing stress concentrations that could lead to failure.

In interference fits, for instance, the components are designed to fit together with a slight overlap, which not only results in a secure connection but also helps in spreading shear forces evenly across the joint. Similarly, transition fits allow for some degree of clearance while still providing sufficient contact to distribute forces effectively.

Options suggesting variability based on material or fastener size do not hold with respect to the defining characteristics of interference and transition fits. These fits are fundamentally structured to provide consistent performance regardless of those variables, focusing instead on the geometric relationship and contact area which directly influences shear force distribution.