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--></style></head><body lang=EN-US style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>Hello,</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I would like some clarification about the “Union - oil gauge pipe” before I over tighten and break something. Number 56 in the picture below. The threads going into the block are definitely tapered, however, the Union gets tight before sealing against the washer (No. 57). I don’t want to over tighten and damage the threads as I suspect the threads are not a standard size. I was thinking of using two copper washers and thread sealant.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Any other suggestions?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><img width=288 height=265 style='width:3.0in;height:2.7604in' id="Picture_x0020_3" src="cid:image001.jpg@01D872C3.1929AB20"></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Harold<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>