#1
I remember one of these falling off my guitar when the outer bolt came unscrewed... it used to between the washer pictured and the guitar. I experience slight static on my amplifier (even with distort/drive off) and hypothesized that maybe the missing washer was the culprit. Is there any correlation between the static and the missing washer?
#2
probably, with the washer off the jackplug was loose so it could move around and make noise
#4
Nut was the word I was looking for... unfortunately, the loss of the washer was quite a while back... I'm assuming I can just pick one up at a local Guitar Center?