| Manufacturer | BOSSARD |
| Type of protective element | protecting washer |
| Material | spring steel |
| Plating material | black finish |
| BN standard | BN 833 |
| Symbol | Shaft diameter |
|---|---|
| [mm] | |
| B0.8/BN833 | 0.8 |
| B1/BN833 | 1 |
| B1.5/BN833 | 1.5 |
| B2/BN833 | 2 |
| B2.5/BN833 | 2.2 |
| B3/BN833 | 3 |
| B3.5/BN833 | 3.5 |
| B4/BN833 | 4 |
| B4.5/BN833 | 4.5 |
| B5/BN833 | 5 |
| B6/BN833 | 6 |
| B7/BN833 | 7 |
| B8/BN833 | 8 |
| B9/BN833 | 9 |
| B10/BN833 | 10 |