A Southbend Range 4049-1 Hex Nut secures the butterfly valve in place for stable adjustment and reliable function.
The hex nut secures the butterfly valve assembly to maintain proper alignment and reliable movement during operation. Its 5/16-18 threading and hex shape provide a tight, stable connection that resists loosening from vibration and supports consistent valve performance.
The hex nut may need to be replaced if the butterfly valve becomes loose, shifts out of position or no longer holds adjustment securely during operation. Physical signs can include stripped threads, rounding on the hex surfaces, corrosion or other wear and environmental signs may include exposure-related rust, grease buildup or heat that could weaken its fit.
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