After I read your post, I took a magnet to the steel plug shield provided by Paragon. The metal is NON MAGNETIC, confirming that it is a 300 series stainless steel. Very little, if any, iron, and lots of chrome & nickel. I'd have never dreampt this part would be stainless steel. Talk about overkill.

You're quite right, it takes s special flux to make this work. It probably would have been sufficient for RCEXLto use nickel or tin-plated carbon steel, thus providing corrosion resistance along with solderability. That combo works for the shields for the larger plugs, so why do something different for the 1/4-32 plugs????

The worst part is the Paragon kit contains no instructions, and no mention of special flux. Research indicates the flux should contain hydrochloric acid, zinc chloride, and ammonium chloride. This is indeed a powerful mix. It's not hard to get, it's just silly for RCEXL, the makers of this kit marketed by Paragon, to not fully inform their customers.

TKG thanks VERYMUCH for your information!<font color="#292526" size="3" face="Arial"><font color="#292526" size="3" face="Arial"><font color="#292526" size="3" face="Arial"><p align="left"></p></font></font></font>