(throws a little gas on the 'screw' fire) The IDEAL catalog I have from 2000 on page A-11 shows a UL and CSA stamping for the whole grouping of grounding connectors and accessories, which includes the screws. BUT... the online catalog page show specific bullets of UL Listed on all but the couple of bare screws. I'm going to drop a note to IDEAL rep and see what he comes up with.
Even a blind hog can find an acorn every now and then
