Guest Anonymous Posted August 24, 2002 Share Posted August 24, 2002 I bought a gauge from summitracing and it doesn't fit my bottle. It is a 4 AN fitting. I have NOS kit 5124. Do I need a 6 AN fitting? What does it mean? The gauge doesn't screw on all the way and it leaks. Quote Link to comment Share on other sites More sharing options...
Guest greimann Posted August 25, 2002 Share Posted August 25, 2002 I don't know the specifics about your kit, but typically gauges and the ports they screw into are NPT threads and not AN. Small gauges come with 1/8 NPT and large diameter gauges use 1/4 NPT. Note that NPT thread sizes are based on the ID of the pipe used, and the OD of the threads are larger. AN fittings are typically used for hose and pipe fittings. Quote Link to comment Share on other sites More sharing options...
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