When you click Add Thread or Modify Thread from the Thread Library dialog box, the Add/Modify Thread dialog box is displayed for you to create or modify the thread parameters. These parameters are explained next.
To open the Add/Modify dialog box:
Thread Type
Tap Label - is the name of the tap that displays under Thread Type. This name is shown when you select this thread type for a tapping operation.
Nominal Diameter - sets the nominal diameter of the thread.
Small Pitch Diameter - sets the small pitch diameter of the thread.
Pitch - sets the pitch of the thread.
Angle - sets the angle of the thread.
Hole Sizes
Cutting - is the size of the drill used for this Thread Type when you select a cutting tap tool.
Rolling - is the size of the drill used for this Thread Type when you select a rolling tap tool.
After defining all of the parameters, click OK to update the thread parameters in the Thread Library.