• qra-1

    Conical flange with flat ground bottom to allow the head to sit flatly on a reaction kettle or flask.

  • qra-2

    Conical flange with flat ground bottom to allow the head to sit flatly on a reaction kettle or flask. Fourth joint is a 10/30 outer joint to permit a thermometer to be inserted vertically to the bottom of the vessel.

  • qra-3

    Conical flange with flat ground bottom to allow the head to sit flatly on a reaction kettle or flask. Fourth port is a #7 internal thread with nylon bushing to permit a thermometer to be inserted vertically to the bottom of the vessel.

  • qra-4

    Conical flange with flat ground bottom to allow the head to sit flatly on a reaction kettle or flask.

  • qra-6

    Flat flange with flat ground bottom to allow the head to sit flatly on a reaction kettle or flask.

  • qra-7

    Flat flange with flat ground bottom to allow the head to sit flatly on a reaction kettle or flask. Fourth joint is a 10/30 outer joint to permit a thermometer to be inserted vertically to the bottom of the vessel.

  • qra-8

    Flat flange with flat ground bottom to allow the head to sit flatly on a reaction kettle or flask.

  • QRA-9

    Conical flange with flat ground bottom.