Fasteners connect parts together without allowing movement at the hole location.

Use the guide bar options to search for single or aligned holes, filter the search results by hole size, and select what type of fastener to create.

Click the satellite icon that appears when you hover over the Fasteners tool to display a table of all fasteners in your model.

Creating Fasteners

Detect features where a fastener can be created, select what type of fastener to create, then click Connect All.

  1. On the Structures ribbon, select the Fasteners tool.

  2. Use the guide bar to filter the search results for Single Holes or Aligned Holes. Click the icon to filter the search results by hole size.
  3. Click the Find button.
    Detected features are displayed in red.
    Note: Hold down the Ctrl key to select and deselect holes individually.
  4. Select what type of fastener to create (Nut and Bolt, Screw, etc.). Selecting Auto will automatically determine the best type of fastener to place at each hole location. Options vary based on what was selected in the previous step.
    Note: When defining fasteners, you can create grounded bolts and grounded screws that act as supports in load cases. A grounded fastener mimics the nut and bolt or screw being fastened to another part that is not available in the model, and appears under Load Cases in the Model Browser instead of under Connectors. The axial and sheer stiffness for grounded fasteners can be modified in the Property Editor under Connection Stiffness.
  5. Click the Apply button on the guide bar to automatically create fasteners in all of the selected holes, or click selected holes to create fasteners individually. Once fasteners have been created, click on a fastener to edit it.
  • To automatically detect relevant features when the tool is opened, go to the Preferences under Inspire > Geometry and turn on Autofind.
  • If Auto is selected on the guide bar, the tool will automatically place nuts and bolts in through holes and screws in blind holes. If you select Nut and Bolt, fasteners will only be created in selected through holes, while selected blind holes will remain unfastened. Screws can be placed in both through holes and blind holes.
  • You can enable fastener pretension and enter a magnitude for the pretension force in the Property Editor.
  • Fasteners can be used as optimization constraints. You can enable optimization for fasteners in the Property Editor.
  • Suppress/Unsuppress a fastener to understand its effect on your model. On the fastener, right-click and select Suppress. From the Model Browser or Table, right-click and select Unsuppress.

Find Options

Click the menu on the guide bar to filter the search results.

  • Find Larger/Smaller/Similar: Find holes that are smaller, larger, or similar (±5%) in size to selected holes.
  • Options: Click to specify options for the find operation.

  • Size: Specify a minimum and maximum size range for the hole diameter. Click the icon to reset the default value.
  • Find parts in holes: If enabled, the Fasteners tool automatically finds existing geometry in holes, hides it, and deactivates it so that it is not included in analysis or optimization calculations. Deselect Find Parts in Holes to disable this behavior, in which case you will need to delete the existing geometry manually.

Microdialog Options

Click a selected fastener to open a microdialog and edit it. If the Fasteners tool is not active, double-click the fastener(s) you want to edit.

  • Use the +/- icon to change the direction of the fastener.
  • Use the pull-down menu to change the type of fastener from a nut and bolt to a screw or vice versa.

Fasteners Table

The Fasteners table lists all of the fasteners in your model including the type of connection, the parts it connects, and the assigned material.

Click the satellite icon on the Fasteners tool to display the table.

Figure 1. Fasteners Table

The table data can be edited with the following actions:

To Do this
Rename a fastener Select the cell in the table and then click again to make the field editable.
Change the connection type or material Select the cell in the table and then select a different option from the list.
Sort a column Click the column header. Click repeatedly to toggle between ascending and descending order.
Add or remove columns Right-click on a column header.

Mouse Controls and Keyboard Shortcuts

To Do this
Add hole to the selection Left-click an unselected hole. The hole turns red.
Chain select a group of aligned holes Double-click an unselected hole. All of the neighboring aligned holes turn red.
Deselect a hole Hold down the Ctrl key and left-click a selected hole.
Create a fastener Left-click a selected (red) single hole or group of aligned holes.
Exit the tool Right-click and mouse through the check mark to exit, or double-right-click.