Hey, its not like you were the first person to forget to tighten a nut! On this bike (B441 bitsa, sort of like an Enduro ish) my list includes a lovely brand new peanut muffler (now a little dented), the petrol tank (that was a tad exciting), pinch bolt on the steering head (handling commanded my full attention with that one), rear wheel (to be fair only the rt hand side, but it did make the back end a little squirrely), handle bars, seat. This of course does not include the various bits that fell off on every ride due to vibration until I learned that spring washer, nylock nuts AND thread locker are required EVERYWHERE.
Personally I would use some PTFE tape as well. I know it is parallel thread sealed with a washer, so should not need it, but it helps.