Your meaning the barrel nuts or Cross dowels, https://www.screwfix.com/c/screws-na...els/cat7280106
Polycarb is good across larger flat surfaces, but around holes as mentioned above, it is weak and can crack across on impact. My wheel bearing holders are machined from polycarbonate, and on large impacts (shrapnel and arena roof) the plates cracked straight across the holes.
I believe Killerhertz suffered quite a bit from cracked panels from mounting holes?




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