PEM nuts

[jdgleitz]

Has anyone found a source for the compression tube PEM nuts, or another suitable 528 weld nut?

[dougm]

McMaster Carr has them
http://www.mcmaster.com/#pem-style-nuts/=h3f6y8

I ended up making my own on a lathe. The ones in the center of this pic:
http://www.damowry.com/hatz/displayimag ... fullsize=1

And tack welded in place in this pic:
http://www.damowry.com/hatz/displayimag ... fullsize=1

[jdgleitz]

Thanks Doug. Not sure why I didn't find them in McMaster Carr.

Those you made look very nice. It doesn't look like too much trouble to do at the same time as the tube end fittings.

[dougm]

You're right, they really aren't any different than the larger fittings and machining them is all the same process. The lathe I used had a collet setup so making these was really easy.