Two Types of Screwdriver Rotary Switch Dials Available

Question

I was looking at some rotary trimmer switches:
http://www.grayhill.com/assets/1/7/DIP_Series_94H.pdf
And noticed that the flush screwdriver dial is available in two different designs for the same part.

The fact that the same part offers both (rather than some parts offering just one design and other parts offering only the other design) seems to imply that the dial design functionally matters somehow in some applications. But I can't think of a situation where it would actually matter. Has anyone come by a situation where it does?

Jasen · Answer

if you have a machine on the production line that sets them automatically to the correct preset you need to have the slot facing the right way.

Transistor · Answer

Figure 1. Images from the datasheet.
The A type seem to have a protruding shaft to take a knob. The arrow can be used when the knob is not present and as an assembly guide as to where to place the knob digit window.
The F type are flush.

No, this answer is not correct. Some of the A type are flat. I don't know.

Two Types of Screwdriver Rotary Switch Dials Available

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