(to be clear, I know I can just check knot-strengths for a general end-of-line attachment, it's the inclusion of the steel thimble - I'll find a link to add to end of post - it's that inclusion that makes me think that the type of knot becomes critical, if the knot capsized over the thimble it'd be catastrophic! Part of me fears that these things are not safe for use AT ALL with rope, only with steel line, in which case they're deskweights for me....but they DO make rope-OK thimbles so I just don't know if these are OK to use and, if so, what knot I should be using) And would there be any reason to use a different knot at the end-of-a-line where you're connecting a steel O-Ring? I'll be cutting pieces of 11.7mm climbing rope to make things and the ends need to be strong so I got 1/2" steel thimbles so I can have steel "eyelets" at the ends of these lines, the problem is that all I know is that I can't use cinch knots, past that I know any fixed-knot will work but what I need to know is which is the strongest, or at least one of the top couple strongest? (Anchor bend? Clove hitch? Nilsson knot? Figure 8? Figure 8 on a bight maybe, because then you could "count the line twice"?)
I know there's a specific/exact/objective answer to this and "a fixed knot" isn't useful, these ropes are being made for tree climbing where failure would be disastrous (should go w/o saying but, no, I am not going to be using such knots in a life-critical situation an hour after learning them, I just don't know what knot to make my "go to" when I'm cutting sections of rope to affix carabiners, o-rings etc to for making false-crotches / lanyards / etc)
I got the heavy duty, 1/2" thimbles / the largest ones found on the bartlettman webpage, they are thick/heavy steel.