/British_standard_pipe_thread" title="British standard pipe thread" class="mw-redirect">British standard pipe threads</a> defined in ISO 7, which are commonly used in water supply, cooling, pneumatics, and hydraulic systems. These threads are designated by a number between 1/16 and 6 that originates from the nominal internal diameter (i/d) in inches of a steel pipe for which these threads were designed. These pipe thread designations do not refer to any thread diameter.</p>
<p>Other threads that used the Wh