Why Small Burrs Cause Big Problems with HVAC valve stems

https://oem-components-journal.juniperbrief.com/posts/choosing-useful-tolerances-for-flow-meter-bodies

Why Small Burrs Cause Big Problems with HVAC valve stems Production teams often know a part is key only after it causes a delay. HVAC valve stems support heating and cooling controls, and their fit can affect steady valve movement