material for sleeve bearing anti-rotation pins (insulated) 1

[electricpete]

I believe NEMA G-11 is a common standard material (which has insulating properties and relatively good strength) used for sleeve bearing anti-rotation pins (in motors where the bearing is insulated from its housing).

Is anyone aware of stronger materials for this sleeve bearing anti-rotation pins, or perhaps the feasibility of inserting a thinner-diameter steel pin inside a hollow (drilled out) G-11 pin?

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(2B)+(2B)' ?