Thanks Mad Mango;
This specific component is used as a "bung" in a furnace assy. The mating (male thread) part is actually a brass nipple of, which explains the need for a low-pressure tight class-3 thread.
I truly appreciate your response.
In the Ozarks...
I have a small 304ss part that I must thread (tap) on a production basis. The part is stamped out of .050" thick 304ss with a punched thru extrusion that has sidewalls about .100" high. The I.D. of the extrusion is .284" dia. and it gets tapped with a 5/16-32 UNEF-3B L.H. thread. The .284" dia...