For your buttress connections to be compliant under the 16th edition of the API 5B, you must inspect run-out.
When inspecting buttress run-out with a Gagemaker BR-2001, inspectors often question where to place the contact point on the thread. Now, the new API 5B Section 188.8.131.52 specifies the location of the inspection point.
When the thread path terminates/vanishes after the triangle make-up stamp, place the contact point at the apex of the triangle.
When the thread path terminates before or within the triangle make-up stamp, place the contact at the thread’s termination point.