Warp 9 rotor nut, M6 x 1.00.
Rotor nuts hold a safety critical joint and they are reused more often than they should be. Locking features wear out with each cycle, and a rotor fastener that will not hold torque is worth replacing rather than retightening, since there is no second line of defence behind it.
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You can still order it now — it’s expected to ship in about .