Well, the PLA bolts I made may not be as strong as I thought. I had a 1/4-20 PLA bolt holding a chuck stand like above but with 6 chuck keys so a bit of weight. Thought it'd be nicer if the bolt was printed as well. Looked plenty strong. Well, I came back in the shop the next day and the whole thing had fallen off the supporting arm. The bolt broke during the night, presumably being sheared from a horizontal axis bending stress (the stand base was tilted). I am thinking that the layered fabrication lends itself to weakness if the layers are not sufficiently fused for whatever reason. (I had printed the bolt in a vertical position so the layers were perpendicular to the bolt center axis.) And another 4mm PLA bolt I made also broke in 2 while threading it into a nominally the same size but tight threaded hole.
OTOH, I printed a 10mm bolt -so quite a bit thicker- and I can't break it by hand trying to bend it.
All of those were printed around 220C.
So, caution needed there, maybe.