NPT Thread Gages - Willrich
Gaging of NPT threads is quite easy and differs from straight threads in that only one gage, an L1 plug or L1 ring is used to determine acceptability.The taper pipe thread plug has a step at the L1 distance from its small end. When turned hand tight into the product’s internal pipe thread, (do not force the gage), the step is required to be ...
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