Fixation in the mounting of the bearing housing/side cover (left) on the pump housing (right) of a Napco gear pump: order of screwing.
<ul><li><a href="//commons.wikimedia.org/wiki/File:Napco_Rotary_Gear_Pump.gif" title="File:Napco Rotary Gear Pump.gif">Napco_Rotary_Gear_Pump.gif</a>: Reed T. Warnick</li>
<li>derivative work: <a href="//commons.wikimedia.org/wiki/User:Cdang" title="User:Cdang">Cdang</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Cdang" title="User talk:Cdang"><span class="signature-talk">talk</span></a>)</li></ul>
CC BY 2.5
<ul><li><a href="//commons.wikimedia.org/wiki/File:Napco_Rotary_Gear_Pump.gif" title="File:Napco Rotary Gear Pump.gif">Napco_Rotary_Gear_Pump.gif</a></li></ul>