itworth 55° angle include Brass Threads, British Standard Conduit (BSCon), Model Engineers (ME), and British Standard Copper (BSCopper).</p>
<table class="wikitable" border="1">
<caption>Whitworth thread sizes<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span>[</span>4<span>]</span></a></sup></caption>
<tr>
<th>Whitworth size (in)</th>
<th>Core diameter (in)</th>
<th>Threads per&#160;inch</th>
<th>Pitch (in)</th>
<th>Tapping drill size</th>
</tr>
<tr>
<td>1/16</td>
<td>0.0411</td>
<td>60</