This document discusses preventing failures in rotary shouldered connections used in drilling. It explains that current inspection methods using nearly 100-year old gauging equipment are insufficient. Small variations in the pitch diameter of connections, which are not properly accounted for, can lead to lack of interference between threads and increased stresses. This can cause common damages like shoulder galling, box swelling, and stress cracking over time. The document calls for a new approach to gauging and inspection of both new and used connections to better control pitch diameter and ensure proper thread interference.