Thread Standards Management

	When you create a thread or a tap, its main diameter (hole diameter) is used as a reference for computing thread standards. This behavior can be managed by means of two modes: main diameter and thread diameter.
	You must have the administrator rights to access and modify the thread standards.
	You can select the required mode by navigating to Tools > Options > Mechanical Design > Part Design tab, Thread/ Tap area and selecting or clearing the Main diameter used as reference for standard management check box.
	By default, the Main diameter used as reference for standard management check box is selected and the main diameter mode is enabled. In this mode, following behavior is applicable: If a standard already exists on a thread or a hole, and if you load a new standard, the search is performed keeping the previous value of the thread. If a standard doesn't exists on a thread or a hole, and if you load a new standard, the first value is initialized according to the main diameter of the hole. In the Hole Definition dialog box, under the Thread Definition tab, when you select Threaded check box: Hole diameter is kept. Thread diameter = Hole diameter + 10%. This is applicable only if the Hole Standard is set to No Standard in the Type tab.
	When you clear the Main diameter used as reference for standard management check box, the Mode_Thread_Diameter is enabled. In this mode, following behavior is applicable: If a standard already exists on a thread or a hole, current behavior is kept. If a standard doesn't exist on a thread or a hole, and if you load a new standard, the first value is initialized according to the thread diameter. In the Hole Definition dialog box, when you select Threaded check box: Thread diameter = Hole diameter Hole diameter = Hole diameter - 10%. This is applicable only if the Hole Standard is set to No Standard in the Type tab.