Hexalobular (6 Lobe) socket spacer screws
BN 20921
| Drive | 
            Drive
            Hexalobular socket
 | 
| Material | 
            Material
            Steel
 | 
| Surface | 
            Surface
            zinc plated blue, added lubricant
 | 
All features
Features
| Drive | 
            Drive
            Hexalobular socket
 | 
| Material | 
            Material
            Steel
 | 
| Surface | 
            Surface
            zinc plated blue, added lubricant
 |