1018F  (RD19790  Rotor Nut)

Genuine Shimano rotor nut (part #RD19790, SKU 1018F) — the threaded fastener that secures the rotor assembly to the spinning reel's main shaft, keeping the bail arm and line roller rotating smoothly under load. A worn or stripped rotor nut can cause rotor wobble, inconsistent retrieve, or the bail to disengage unexpectedly during a fight. Cross-references with Shimano part number RD19790. OEM replacement guarantees proper thread pitch and torque spec for a secure, rattle-free rotor connection. Available from Offshore Tackle & Repair in Stuart, FL — your trusted source for genuine Shimano spinning reel parts and professional reel service.