NO, do NOT remove the spark plug washers on drool tube heads!!

Hey Dan, I just installed the NGK ZFR5n's in my 74 Slant. I removed the gaskets, but I noticed the base of the plugs was more narrow. Does that counterbore stop the more narrow plug? I ask because the plugs tightened to about 20 ft lbs. and then loosened up almost like they were stripping ( or breaking through the tube) but then tightened up properly. What do you guys think