Heavy Duty 60 Degree Self-Return Bar Chair Stool Replacement Swivel Plate

Rotation: auto return 60 degree.
Application duty: Commercial use.
Surface finish: unfinished.
Ball bearing: steel ball bearing for smooth rotation with 32 full ball bearing.
Other: heavy duty welds.
Size: 7" square flat top and bottom plates.
Pitch: 3 degree.
Mounting holes are 0.83" long oval shaped slots & accomodate most 5", 5.25" & 5.5" square mounting screw hole patterns (mounting hardware not included),suitable for 1 / 4" bolts.
Totally 5 kinds of swivel plate are available:
(1)non-return 360 degree, flat;
(2)non-return 360 degree, 3 degree pitch;
(3)non-return 360 degree, 3 degree pitch, with compressed nuts;
(4)self-return 60 degree, 3 degree pitch, 32 ball bearing;
(5)self-return 60 degree, 3 degree pitch, 32 ball bearing,with compressed nuts.