This is a template attribute. Template attributes can be used in filtering, or to retrieve data from the model to use in drawings and reports. For example, when you create a report, Tekla Structures replaces the attributes added in the report template with the corresponding object property values.

For bolts, shows the bolt standard and the standard of each possible washer or nut as they appear in the Bolt assembly catalog dialog box (for example, 7968/2041/2041/2041/2067/2067). For objects other than bolts, the field is blank.