H.D. Chasen Company
 
British Standard Whitworth (BSW) Thread Taps
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1/16" - 60 BSW Thread Tap 
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1/8" - 40 BSW Thread Tap 
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5/32" - 32 BSW Thread Tap 
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3/16" - 24 BSW Thread Tap 
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7/32" - 24 BSW Thread Tap 
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1/4" - 20 BSW Thread Tap 
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5/16" - 18 BSW Thread Tap 
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3/8" - 16 BSW Thread Tap 
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7/16" - 14 BSW Thread Tap 
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1/2" - 12 BSW Thread Tap 
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9/16" - 12 BSW Thread Tap 
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5/8" - 11 BSW Thread Tap 
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3/4" - 10 BSW Thread Tap 
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7/8" - 9 BSW Thread Tap 
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1" - 8 BSW Thread Tap 
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1-1/8" - 7 BSW Thread Tap 
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1-1/4" - 7 BSW Thread Tap 
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1-3/8" - 6 BSW Thread Tap 
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1-1/2" - 6 BSW Thread Tap 
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1-3/4" - 5 BSW Thread Tap 
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2" - 4-1/2 BSW Thread Tap 
 
   
     
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
