I can't ID the screw on my servo back case

I need a longer version of the screw on the back of my servo but I can't figure out whether it's metric inch or anything else.

Its one of those 4 screws that keeps the back case on and holds the servo together. The threads appear to be fewer. I'd say 30 threads per inch, and a diameter around 1/16in.

Here is an image of the screw.

http://static.rcgroups.net/forums/attachments/6/4/8/8/5/1/a8729584-60-20160221_161926.jpg

The guy at the hardware store couldn't figure it out either.

You can look for servos that are larger that would have longer screws. I have seen servos that have longer bodies.

I decided to just use machine screws since they seem to screw in anyway. The screws I believe are called sheet metal screws.

Ace Hardwares usually have a screw gauge hanging in the hardware department. Just take your screw ina nd check it.

I doubt you will find servo size screws at any general purpose hardware store. You might find some threaded rod at a hobby shop and cut to length and put nuts on the end. The reason you need longer screws might open alternative ideas.