What marking is required for washers used in high tensile bolt connections?

The requirement for marking washers used in high tensile bolt connections is based on the standards that dictate their performance and compatibility with high-strength bolts. Marking them as “HV TCCM Bolting” signifies that these washers are specifically designed and manufactured to meet the necessary criteria for high-tensile applications, ensuring that they can withstand the increased loads and stresses associated with such connections. This marking is crucial for identifying the grade and material specifications required for the intended application, promoting safety and reliability in structural integrity.

In contrast, the other options do not convey the specific requirements for high-tensile applications. For example, a standard grade marking does not assure compatibility with high-strength bolts, while "new installation" and "rework approved" refer to the installation status of components rather than their specific material characteristics or performance standards. Therefore, adherence to the HV TCCM marking ensures that the washers meet the necessary standards for safe and effective use in critical connections.