4" x 4-1/2" Weld-On Caster Mounting Plate Unplated Steel SKU: 52000.23 for standard 2" wide casters 4" x 4-1/2" plate weld-on
$4.95
Bolt-on Swivel Lock for 4"x4.5" Top Plate Swivel Casters SKU: SL160000 for 4" x 4-1/2" top plates swivel rigs must be notched field-Installable
$20.45
Bolt-on Swivel Lock for 6.25'' x 4.5'' Plate Swivel Casters SKU: SL3000000 for 6-1/4" x 4-1/2" top plates swivel rigs must be notched field-Installable
$37.89
Stainless Steel Bolt-on Swivel Lock for 4"x4.5" Plate Casters SKU: SWVLOCKX2SS for 4" x 4-1/2" top plates swivel rigs must be notched field-Installable
$44.77