No, plastic as in plastic. The pinch bolts however are made of cheese.
Yes, the crank arm fixing bolt are made from plastic but Shimano do have metal alternate options though for the higher end stuff.
That said, it's a preload bolt and does nothing IF the crank arm bolts are done up to proper torque.
@coventry_eagle started
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No, plastic as in plastic. The pinch bolts however are made of cheese.