Quote:
Originally Posted by ratdude747
Off topic: I'd personally use 10-24 bolts over 10-32. coarser threads in my experience are stronger (the weight difference is negligible).
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I prefer 10-32 primarily because the tap is stronger, also most COTS parts with #10 are 32TPI, and also you can finesse the tightening more. I've never stripped out a 10-32 thread in aluminum. 10-24 is much more common in hardware stores though.
Anyhow, you have to really decide what's best for the application. 10-32 button head is my bolt of choice, but occasionally we'll go to flat head in areas that need it, socket head if button head isn't available for the length. In any bolt, I prefer the black-oxide alloy steel as it is stronger than stainless by nearly double. Some sizes from McMaster are only available in stainless though, and stainless is often cheaper.
Occasionally, we'll even go to other sizes even all the way to 3/8-16, for mounting the superstructure for example, or 6-32 nylon socket heads for mounting Victor speed controls, or 1/4-20 nylon socket heads for mounting the power distribution panel.