condensate drain plug

My furnace was leaking a tiny bit from the plugged end of the condensate drain. It has a provision to drain either on the left and right side of this box. One side has a 3/4" pvc street elbow that goes to the trap etc. The other had a cheap plastic red drain plug with a 3/4 hex female socket and a slot for a flat blade driver. That plug leaked. I removed, it didn't look like there was much, if any, pipe dope on the threads. I reapplied dope and I think I fixed the leak. However, the plug flat blade slot was stripped out when I got to it. So if I have to remove it again, it may need a new plug. Can I just use a standard pvc plug? Is there one with a female hex instead of male? What would be a standard amount of tightness for this flimsy plug? The previous installer bottomed the sucker out (hence the stripping)... I applied dope and went snug but not bottomed out. I could still turn a screwdriver a few times im sure. Is that the proper technique? Any tips for this seemingly easy fix?