Cobra Trailer Jam-nuts (loose)
We Manufacture and ship large skidded Pump & piping systems with a couple hundred flange bolts on each one. All tight, with a successful hydrotest to prove it. Every now and then the combination of trailer suspension, road condition + transit speed = a very bad vibration frequency that loosens up the nuts, leading to customer questions regarding our competency. It's impossible to predict.
SF
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