| Manufacturer | BOSSARD |
| Mounting element | nut |
| Nut shape | hexagonal |
| Features | low profile |
| Material | brass |
| DIN standard | DIN 439B |
| BN standard | BN 508 |
| ISO standard | ISO 4035 |
| Plating material | nickel |
| Symbol | Thread | Spanner size |
|---|---|---|
| [mm] | ||
| B2/BN508 | M2 | 4 |
| B2.5/BN508 | M2,5 | 5 |
| B3/BN508 | M3 | 5.5 |
| B4/BN508 | M4 | 7 |