CADWorx Plant I tab: Setup Size/Spec > Threaded 
Setting toolbar: Threaded
Specifies the threaded fitting mode for hub-based components, and sets the mode in the CADWorx Plant Setup.. Dimensions and engagement properties are based on the threaded section of the specification. To route in threaded, right-click the pipe component in the Spec View palette, and then select Threaded Router. For more information, see Draw pipe components.
You can also change the fitting mode in the CADWorx Plant Setup dialog box. For more information, see Setup.