Per API 5B 5.5.2, Thread addendum "shall be measured on round thread."
TA-3002 Thread Addendum Gage Inspecting a Part
Thread addendum is now a required, mandatory element to be inspected.
API 5B 6.1.1 CREST DIAMETER SETTING STANDARD REQUIREMENTS
Per 6.1.1, a manufacturer "shall have access to setting standards for
thread diameter gauges [...] for each size and type of thread produced.
" Traditional standards may need replacing.
Crest diameter and ovality setting standards are required.
Thread Check Inc. is an authorized Gagemaker distributor.
For additional information and pricing contact firstname.lastname@example.org or 631 231 1515