Yep, the measurement of .020 inch is on the open strings, it's Fender's standard specification for all their Strats, Teles, and other six-string guitars, except Basses, I think they use a different spec on their Basses.
I get a similar buzzing issue with my strat, when I did the bridge-grounding I soldered one end of a piece of insulated wire to a suitable point on the back of the volume control, and the other end was soldered to the trem-spring claw on the back of the guitar body, since you have a Telecaster style guitar, you just use a piece of insulated wire to ground the bridge to the volume control as per how I did with my strat, but instead of soldering the other end to the spring claw, you just strip about an inch or so of the insulation off the end, twist the strands together, and then put that underneath the bridge plate before attaching the bridge with the mounting screws, to check if you have properly grounded the bridge you can use a multimeter set to low ohms, you should see close to zero ohms if you touch one multimeter probe to the bridge and the other probe to the sleeve connection on the output jack.
There's at least four possibilities for no sound from the neck pickup, the neck pickup could be open-circuit, there could be a bad solder-joint, or a bad pickup selector switch contact, or the neck pickup could be short-circuited somewhere.