- Lock washers are designed to keep threaded fasteners from loosening
- They prevent vibrations and have external teeth to prevent rotation
| Type | Countersunk Lockwasher |
| Style | External Tooth |
| Size | #12 |
| Material | Steel |
| Inside Dia. | 0.231 |
| Outside Dia. | 0.421 |
| Thickness | 0.025 |
| Tooth Length | 0.128 |
| Countersunk Angle | 80–82° |
