Rotatable Positioning Nozzle

A rotatable positioning nozzle comprising:

• a body including an intake defined on a first end of the body, a spray hole formed on a second end of the body and communicating with the intake, an engagement groove defined on an outer wall of the body adjacent to the intake, wherein a diameter of the intake decreases, a cross section of the engagement groove is circular, the engagement groove has an inward shoulder proximate to the intake, an outward shoulder adjacent to the spray hole, multiple limiting recesses surrounding the engagement groove proximate to the inward shoulder, and multiple defining protrusions, wherein a respective one defining protrusion protrudes from two sides of a respective one limiting recess, wherein the body further includes a second central dotted line defined on a center thereof, and the spray hole has a third central dotted line defined on a center thereof, wherein an angle is defined between the second central dotted line and the third central dotted line.