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What are the threads between the gun and hose? It isn't M22-14 or M22-15 or 1/4"QC or 1/4"NPT or 3/8"NPT - it looks like close to 1/4" but not NPT? I'll get an adapter if I can find out for sure what the thread size and pitch is...
The size is m14*1.5.
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