Abstract: A universal coupler device includes a housing member having a peripheral flange, a sealing ring engaged in the housing member, a coupler member having a ball portion rotatably received in the housing member, and the peripheral flange is engaged with the ball portion for anchoring the ball portion to the housing member, and a ring member is fitted into the housing member and engaged with the ball portion for anchoring and retaining the ball portion of the coupler member in the housing member, the ring member and the peripheral flange are beveled to form inner rims and to engage with the ball portion for reducing a contact area between the ring member and the peripheral flange and the ball portion.