Flanges toolbar: Stub End 
Command line: STB
Places a stub-end coupling component in the X-Y plane. You can place gaskets on flange
sets using Auto Gasket 
. For more information, see Auto Gasket. Gaskets can also be added to flange sets or flanges connecting to other components
by setting the Apply Gasket Insertion Rule.
Length
Defines the length of the stub-end. If no length is defined, the default value from the current specification is used.
Plan end
Starts the stub at the plain end.
Face end
Starts the stub at the face end.