One would think that when you get your thread ring gages calibrated and there are no red flags raised by the reported data you’re good to go. Unfortunately, this sea of tranquility can end up drowning you if you have misinterpreted the reports—something that happens when disputes arise.
There are two key areas that put you at risk: how the gages were actually calibrated and how the results were reported. Most reports do not indicate the ‘how’ element and this can lead to incomplete reports. In some cases, reports are deliberately vague because the lab that issues them knows they are doing end runs around the standards involved.