A polyaxial screw assembly having a threaded shaft, a rod receiver, a bushing, and a deformable tab is provided. The rod receiver includes a side wall forming a proximal end with an interior portion configured to receive a spinal rod and a distal end configured to receive the spherical head. The bushing is disposed between the spherical head and the sidewall of the rod receiver is configured to engage the spinal rod. The deformable tab is within one of the rod receiver and the bushing and engages with the other of the rod receiver and the bushing. The deformable tab may be disposed within the side wall of the bushing. The deformable tab may be configured to apply an axial force along a longitudinal axis of the threaded shaft to increase a friction force between the rod receiver, the bushing, and the spherical head
