Screws get torqued, too
Here is a nice online reference (thanks, EAA Chapter 818). Note that it is for 'bolts, studs, or screws'. Aircraft Spruce's catalog is often handy for figuring out tensile strength of fasteners but I also like GAHco's online rereneces. For instance, their pdf link on the MS24694 page gives tensile information, size specs, and a chart that correlates the old AN509 numbers to the new MS numbers. So you could see that an AN509-832R14 (often the 32 in 832 is left off; what else would it be?) with a AN365 nut should be torqued 12-15 in. lb.
'German torque' is often too tight, especially for the smaller AN bolts, until you've 'calibrated' your hand by using a torque wrench for awhile. I did the AN3 bolts for the rib/spar connections in one of my -6A wings before acquiring a torque wrench. Fortunately I went back and checked; they were all severely overtorqued (up to 100 in/lb!) and had to be replaced.
It is true that pivot bolts don't get torqued (or, sometimes, torqued to shank) but they have castellated nuts and cotter pins to secure them. However, don't take that to mean that torquing castellated nuts is not important. On your engine mount, for example, the nuts should be torqued and shim washers used to ensure that a cotter pin will secure the nut while it is torqued within the acceptable range.
Some other torque issues: The
torque values I found for 300 series stainless don't mention tension or shear torques and are listed as higher than that listed for structural aircraft hardware (despite, from what I can tell, having less tensile strength), so I try to stick to the same torque values. I haven't used stainless screws other than where called out by Vans, but I know others have used them extensively in non-structural locations.
I generally regard nutplates as tension nuts for torquing purposes. And for soft materials, I try to get as close as I can without actually deforming the part; I find I can torque AN3 in nylon but not AN4. And, lastly, I don't consider myself an authority by any means but these guidelines have worked for me.