1/4" Bolt Size
Our 50mm casters have a 1/4 inch diameter bolt which screws into the bottom of the poles for BJ's Wholesale Club rack model 34167/C25Z-1
Rollin rollin rollin.. Keep those wire storage racks a rollin.
Add mobility to your storage unit.
Each set comes with 2 non-locking and 2 locking casters.
1/4" bolt fits a pole with a diameter of 3/4"
If you have any questions or concerns, call us at 866-375-7994
*except for Alaska, Hawaii, Puerto Rico and the Virgin Islands orders, see Shipping Policy for more details