In bolt installation, which method provides the most consistent bolt tension?

The turn-of-the-nut method is recognized for providing the most consistent bolt tension in bolting applications. This approach involves turning the nut a specified number of degrees after the snug tight condition has been achieved, which ensures that the bolt and joint are adequately tensioned.

This method is effective because it accounts for variables such as friction and bolt elongation, allowing for a more accurate establishment of tension compared to other methods. By relying on a specified angle of rotation, it can help overcome inconsistencies in the friction between the nut, bolt, and washer surfaces, leading to more uniform tension across all bolts.

In contrast, the snug tight method, while useful for initial fastening, does not guarantee a specific tension level and can result in variability due to differing frictional conditions. The calibrated torque method relies on applied torque to achieve tension, which can vary based on surface conditions and lubrication, often leading to inconsistent results. Yield control method focuses on stretching the bolt into the plastic deformation range, which can be difficult to manage without specialized equipment, making it less practical for general applications. Thus, the turn-of-the-nut method stands out for its reliability and consistency in achieving the desired bolt tension.