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12 in Wheel Polyurethane Casters

Plate sizes: 4-1/2 x 6-1/4, 5-1/4 x 7-1/4, 8-1/2 x 8-1/2Bolt holes: 2-7/16 x 4-15/16 slotted to 3-3/8 x 5-1/4; 3-3/8 x 5-1/4 slotted to 4-1/8 x 6-1/8; 7 x 7Diameter: 12, 15-3/8 inTread: 3, 5 inCapacity: up to 12,000 lb
4-1/2 x 6-1/4 inch top-plate casters for warehouse carts on epoxy and smooth concrete. Typical builds show wheel diameters 12, 15-3/8 in, polyurethane and cast iron treads, and capacities 3,000 to 12,000 lb. When floors see chemicals or washdowns, prefer sealed bearings and non-absorbent wheel compounds. Larger plates spread bolt stress on thick frames under continuous tow abuse. Confirm stem length and thread pitch on stem mounts so the shoulder seats flush in the boss.

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