Hex nuts with flange and serrations
BN 20230
~DIN 6923
(Standard withdrawn)
~ISO 4161
| Material | 
            Material
            Steel
 | 
| Property class | 
            Property class
            8
 | 
| Surface | 
            Surface
            zinc plated with thick layer passivation
 | 
All features
Standard
                        ~DIN 6923 (Standard withdrawn)
~ISO 4161
                    Features
| Material | 
            Material
            Steel
 | 
| Property class | 
            Property class
            8
 | 
| Surface | 
            Surface
            zinc plated with thick layer passivation
 | 
Functional principle
1. Tightening: teeth penetrate the surface
2. Loosening: teeth shear off material
3. Surface condition after loosening