Platte River 158387, 12-pack, Hardware, Casters And Glides, Adjustable Glides, 1/4-20 Swivel Glide With T-Nuts Swivel base accommodates uneven floors. Specifications: Diameter=1-1/4 in, Finish=NICKEL, Length=1 in Specifications: Mount=T-NUT, Mounting Hole Size=5/16 in, Threads=1/4-20