I have a Shapeoko 3 XXL, a few years old (S/N 2248, if that helps). I was installing the pwncnc dust boot and I ran into an issue with the bolts that attach it to the z-axis, at the top. The longer bolts provided with the dust boot are M5x0.5, but they don’t fit. So, I set about figuring out what the existing bolt is. Weirdly enough, it’s not metric at all. None of the metric thread checkers matched at all. But, SAE 24 tpi did fit:
Why on earth is there an SAE bolt on my otherwise entirely metric machine? Is it supposed to be like this? Here is where the bolt came from:
Thanks in advance!