What guide should be used when torquing bolts?

When torquing bolts, the appropriate guide to follow is the manufacturer's specifications. These specifications are provided by the bolt maker and are crucial because they account for the specific requirements of the material, bolt size, thread type, and application. Using the manufacturer's torque specifications helps ensure that the bolt achieves the necessary clamping force without being over-tightened or under-tightened. This is essential for maintaining the integrity and safety of the structure or machinery in which the bolts are used.

Other options, while they may hold some merit in certain contexts, do not provide the reliability and accuracy that the manufacturer's specifications do. General industry standards can vary significantly and might not be specific enough for particular applications. Different torque tools may offer varied levels of precision or capabilities, but they can't dictate how much torque a specific bolt needs. Personal experience, while valuable, lacks the consistency and reliability of following manufacturer guidelines, which are designed based on rigorous testing and engineering principles.