More like 60%. I don't know where the 4 N.m torque spec came from.So if I understand correctly, your saying that finger-tightening a socket is applying twice the recommended torque to busbars/terminals, correct?
I just finger-tightened (through a socket( the 1/4” nuts on single-cell jig I made and when I then used the torque-wrench to apply what I’ve estimated to be 12psi / 165lbs I added anew turn or so to the nut (confirming that a socket finger-tightened applied well under 165 lbs, but your 62 lbs sounds very credible).
Was that as tight as you could go by hand or just snug?
p.s. you could probably start a side business hand-tightening various battery-related things and letting us know the approximate range. I’ve been hand-tightening my bus-bars with a Philips-head screwdriver, for example, and would love to know what force is possible to apply by hand using a Philips head bit between finger-tips.
I am just going to lock tight the grub screws in and torque the nuts to some value. I need to do more reading to find out how much.
I am going to sand the battery terminals and bus bars, then apply antioxidant cleaner to make the contact as good as it can be.
I have used ProGold for audio connections. That should work and not risk doing anything bad.