This caster using with bushing nut 3".
When you order the Bushing nut 3", pls check the pipe specification. (Goblin & STS, Thickness)
| Wheel | Wheel Width | Total Height | Load Capacity | Stem Spec. | Stem Length | Offset | Wheel Materials | 
| (mm) | (mm) | (mm) | (Kg) | 
 | (mm) | (mm) | 
 | 
| 50 | 20 | 73 | 35 | 1/2" x 12UNC | 16 | 44 | Urethane |