Abstract: A connecting assembly for a fluid dispensing pump to dispense fluid from a container is disclosed. The connecting assembly includes a first connector adapted to rotatably couple with the housing and a second connector adapted to threadably engage with the first connector. The first connector and the second connector together define a receiving portion to accommodate the neck of the container. The connecting assembly further includes multiple sliders movably disposed within the receiving portion. In such arrangement, movement of the first connector relative to the second connector along a longitudinal axis of the connecting assembly allows movement of the sliders in a radial direction of the connecting assembly. In addition, the connecting assembly includes at least one seal disposed on the sliders to engage with an inner surface of the neck of the container.