1950-1979 Alternator or Generator Pulley Nut 111903181 - OEM Number(s) (111-903-181)
Whether you’re swapping pulleys or servicing the charging system, this Alternator / Generator Pulley Nut is essential for securing the pulley to your shaft. Machined to fit the factory 12 x 1.5mm threads, this OE-style nut is the right choice for any air-cooled Volkswagen equipped with a generator or alternator. Don’t trust worn threads or mismatched hardware—this piece keeps your pulley aligned and locked down under tension.
Fits the following models
• Beetle: 1950–1979
• Karmann Ghia: 1956–1974
• Type 2 Bus: 1950–1971 (Generator)
• Type 2 Bus: 1973–1979 (Alternator)
• Thing: 1973–1974
• Type 3: 1962–1973
Features
• Fits all OE-style VW generator or alternator shafts
• Thread size: M12 x 1.5mm
• Used to secure pulley onto shaft face
• Zinc-plated steel construction resists corrosion
• Sold individually
Tech Notes
• VW OE reference: 111-903-181
• Do not over-tighten—thread stripping may occur
• Use with proper shims and pulley halves to maintain belt alignment
Because Details Matter
This often-overlooked nut plays a big role in your engine’s reliability. Secure your alternator or generator pulley with confidence using a properly threaded, correct-fit fastener that matches original VW specs.
Also known under these part numbers: (For reference only)
- 111-903-181
- 111903181
- 111983181
- 11903181
- 686420326489