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- ~DIN 6923 (Standard withdrawn) ~ISO 4161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