Specification for Screwed spacer sleeve; 20mm; Int.thread: M4; Ext.thread: M4
| Material | galvanised steel |
| Spacer length | 20mm |
| Internal thread | M4 |
| External thread | M4 |
| Spanner size | 7mm |
| Type of spacer | screwed spacer sleeve |
| Mechanical elements features | with internal and external thread |
| Sleeve shape | hexagonal |