API 5B 5.6 & 5.7 REQUIRE BUTTRESS FORM INSPECTION
Per API 5B 5.6.4, Buttress Thread Form “shall conform to … the requirements … of tooth thickness or groove width”.
TW-6001 Thread Groove Width Gage Inspecting a Part
Tooth thickness or groove width is now a required, mandatory element to be inspected for API Buttress threads. Gagemaker’s TW-6001 Tooth Width Gage or assorted Groove Width Go/NoGo Gages will help you with these important inspections.
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