Furniture Hardware and Decorative Building Materials | Furniture fittings:

fit for 5/8" tube O.D., stem threaded 1/4"-20S, tube 16/18GA ( 1.2-1.5mm thickness), color: zinc plated

fit for 1" tube O.D., stem thread 1/4"-20S, 5/16"-20S or 3/8"-20S, tube 16/18GA ( 1.2-1.5mm thickness), color: zinc plated

fit for 1-1/2" tube O.D., stem thread 1/4", 5/16" and 3/8", tube 16/18GA ( 1.2-1.5mm thickness), color: zinc plated