Serrated lock washers type A, external serrations
BN 20231Serrated lock washers type A, external serrations
BN 20231- Standard
- DIN 6798 A (Standard withdrawn) ~UNI 8842 A ~ČSN 021745
- Material
- Spring steel
- Surface
- zinc plated with thick layer passivation
- Hardness
- 350-425 HV