Description MERCURY 1/2"-20 UNF Anti-Theft Nut
Anti-theft nut for Mercury engines, Mariner 40 to 300 hp
Made from high-quality stainless steel, Mc Gard anti-theft devices fit most outboard motors, sterndrive mounts, and HB or sterndrive propellers.
This protection system includes a tamper-proof security nut. It comes with a special mounting/removal socket.
The Mc Gard nut can be fitted to replace an outboard or Sterndrive base fixing nut, or to replace the propeller fixing nut on the propeller shaft
Reference: 74036
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YAMAHA Base Anti-Theft Bolt
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M12x1.75 lock nut
