td>
<td>0.1654</td>
<td>24</td>
<td>0.0417</td>
<td>Number Drill 16 (4.5&#160;mm)</td>
</tr>
<tr>
<td>1/4</td>
<td>0.1860</td>
<td>20</td>
<td>0.05</td>
<td>Number Drill 9 (5.1&#160;mm)</td>
</tr>
<tr>
<td>5/16</td>
<td>0.2414</td>
<td>18</td>
<td>0.0556</td>
<td>Letter Drill F (6.5&#160;mm)</td>
</tr>
<tr>
<td>3/8</td>
<td>0.2950</td>
<td>16</td>
<td>0.0625</td>
<td>5/16&#160;in (7.94&#160;mm)</td>
</tr>
<tr>
<td>7/16</td>
<td>0.3460</td>
<td>14</td>
<td>0.0714</td>
<td>Letter Drill U (9.3&#160;mm)</td>
</