Even if you got precise and wrote code that drew the lines for you and mathmatically handled the angles it still wouldn't end up with shapes that reflect the object you're trying to portray.
It's funny you say that because I actually began thinking about the angles and whatnot, but at this resolution nothing good will come of it.
EDIT: Just now saw your updated post, I though of rotating the nut similar to how yours is positioned, perhaps I'll give that an attempt real quick:
Why didn't I just do that earlier, so much easier and looks better too ;p
Thanks a ton!
I haven't attempted this, but the way I would do it would be to use actual rotation to figure out how it should look in each frame. Choose how many frames you want, and therefore the increment of rotation.
Why a hex but? Try something else.
I did this and re-drew over the rotated sprite to make it mostly match the theme I had in mind, however it simply doesn't turn out as I hoped.
I suppose I don't necessarily need a hex nut, the main character is a robot though so it seemed fitting. I would like something relatively round in shape though, even a star could work.