Hard to Hard would probably tend to loosen up with time.
I have an air fitting elbow here that is color anodized, but I can't
tell if it's hard or soft.
Barna Madau wrote:
> that could maybe give me a little help. I design a lot of aluminum parts,
> some hard ano, some soft or just color ano. My boss (who is in no way an
> engineer or designer) constantly insists that you can't design an assembly
> where you have like anodized parts threading into each other. For example,
> and hard ano part should thread to a soft ano part, and you should never
> have a hard ano part and another hard ano part screw together and the same
> for soft ano. I come from an automotive background, and more to the high
> performance side of it, and I can think of many cases where like anodized
> parts assemble together. First off, aluminum AN (braided hose) fittings all
> thread together and I'm pretty sure none of them are hard anodized. >
> Any opinions?