Why Small Burrs Cause Big Problems with HVAC valve stems

https://cnc-component-insights.lumenforgex.com/posts/understanding-the-cost-of-pneumatic-quick-couplings

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