From:Perry Ruiter Electronic:perry -A-
Subject:RE: Parkerizing or cadmium plating Date:Thu Dec 2 16:47:46 2010
Response to:14839
One rule of thumb for hardware (nuts, bolts, etc.) is if the part number ends with a W it's cad plated ... Perry

I have soaked various nuts and bolts in vinegar and brushed all the rust off. Now how to I know weather to parkerize or cadmium plate. The parts catalog doesn't list the finishes.