3-Inch Casters for Shelf Unit, Set of 4,Threaded Stem 1/4",5/16",3/8" Stem Al...
Threaded stem are d=1/4", d1=3/16",(stem length=20mm),make the universal design allows the threaded rod to be universal used between 1/4, 5/16, and 3/8. Threads rod on the casters are 1/4”x 20, 5/16”x 18, 3/8”x 16,M8,M10.