Petrol Tap Size Guide

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In order to determine the gas thread needed please see the guide below:

Gas ThreadMeasurements
1/8″ Gas3/8″ dia x 28 TPI
1/4″ Gas1/2″ dia x 19 TPI
3/8″ Gas21/32″ dia x 19 TPI
7/16″ Gas7/16″ dia x 19 TPI

TPI = Threads per Inch