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  1. BillWest

    BLUE SPIRAL MARKING ON HYDRAULIC TUBING

    The specification is for SAE J525 (welded) tubing - .875 OD X .065 Wall. BW
  2. BillWest

    BLUE SPIRAL MARKING ON HYDRAULIC TUBING

    Thanks for responding. I'm not sure, but I think it is cold drawn, 1/4" nominal. I am checking that out. BW
  3. BillWest

    BLUE SPIRAL MARKING ON HYDRAULIC TUBING

    Does anyone know the manufacturer of hydraulic tubing with a blue spiral marking on the outside surface? Or, is there some significance to the marking (i.e. a standard or pressure rating)? BW

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