Many tallitot have the bracha before putting on the tallit written on the atarah. But as you can see in the picture below, the Name of Hashem is abbreviated as a 'ד when it is usually rendered 'ה. The point of the abbreviation is so that the tallit can be discarded without a problem of disposing a Divine Name.
Since 'ה is already an abbreviation to avoid using the Tetragrammaton, why do they use a 'ד when 'ה already has no holiness associated with it?