Thread Size Chart

  Deniers European U.S. System Metallic
Thinnest 75/2 #60    
    #50 0000/2 7/2 (MAD)
  120/2 #40 000/2 7/2 (G.S.)
  150/2 #35   5/2 (MAD)
  180/2 #30 00/2 5/2 (G.S.)
  150/3 (450) #20 0/2  
  300/2 (600) #12    
Thickest 300/4 (1200) #6    

MAD – Madeira Co. USA
G.S. – Gunold & Stickma Co.