ねじ下穴径表:管用平行ねじ用(G,PF)
        
        
  
    
      | 単位(mm) | 
      
        | 呼び | 
        D1(内径) | 
        ドリル径(参考) | 
      
      
        | Max. | 
        Min. | 
      
      
        | G 1/16-28 | 
        6.843 | 
        6.561 | 
        6.7 | 
      
      
        | G 1/8-28 | 
        8.848 | 
        8.566 | 
        8.7 | 
      
      
        | G 1/4-19 | 
        11.890 | 
        11.445 | 
        11.7 | 
      
      
        | G 3/8-19 | 
        15.395 | 
        14.950 | 
        15.2 | 
      
      
        | G 1/2-14 | 
        19.172 | 
        18.631 | 
        19.0 | 
      
      
        | G 5/8-14 | 
        21.128 | 
        20.587 | 
        21.0 | 
      
      
        | G 3/4-14 | 
        24.658 | 
        24.117 | 
        24.5 | 
      
      
        | G 7/8-14 | 
        28.418 | 
        27.877 | 
        28.2 | 
      
      
        | G 1-11 | 
        30.931 | 
        30.291 | 
        30.6 | 
      
      
        | G 1 1/8-11 | 
        35.579 | 
        34.939 | 
        35.2 | 
      
      
        | G 1 1/4-11 | 
        39.592 | 
        38.952 | 
        39.2 | 
      
      
        | G 1 1/2-11 | 
        45.485 | 
        44.845 | 
        45.0 | 
      
      
        | G 1 3/4-11 | 
        41.428 | 
        50.788 | 
        51.0 | 
      
      
        | G 2-11 | 
        57.296 | 
        56.656 | 
        57.0 | 
      
    
   
  
                 
          
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ねじ下穴径表(切削加工用)
              
             
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ねじ下穴径表(転造タップ用)
              
             
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計算機
              
             
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