60 Degree Self-Return Boat Or Van Pilot Seat 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: with compressed nut, 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.