FANAR filiera M12 filettatura sinistrorsa

In a busy automotive workshop, a mechanic faces a stripped left-hand threaded bolt on a classic car's wheel hub. Replacing the bolt is not an option, so the mechanic reaches for the FANAR M12 left-hand thread die. Crafted from high-speed steel to DIN 223, this round die cuts clean, precise external threads with a 1.75 mm pitch, restoring the fastener to like-new condition. It is an essential tool for anyone working with reverse-threaded components, from vintage vehicles to industrial machinery.

Key specifications

• Thread size: M12 x 1.75 mm, left-hand direction
• Die type: round threading die, DIN 223 standard
• Material: high-speed steel (HSS), ground thread, bright finish
• Outer diameter: 30 mm; thickness: 11 mm; 4 flutes
• Tolerance class: 6g; suitable for steel, stainless steel, cast iron, and non-ferrous metals
• Country of origin: Poland

Why choose it

Precision-ground from high-speed steel, this die delivers accurate threads and long service life. Its left-hand orientation is specifically designed for reverse-thread applications, ensuring you can cut or repair threads that standard right-hand dies cannot handle. The DIN 223 compliance guarantees compatibility with standard die stocks, while the bright finish resists corrosion and reduces friction during cutting.

Ideal use cases

• Cutting new left-hand external threads on rods and shafts
• Repairing damaged left-hand threads on bolts and studs
• Creating custom fasteners for machinery with reverse rotation
• Maintaining vintage vehicles and equipment

Good to know

This die is manufactured in Poland to exacting standards. It is intended for use with a suitable die stock (not included) and is compatible with a wide range of materials. Always use appropriate cutting fluid for best results.