- 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 | 5/16" |
| Material | Steel |
| Inside Dia. | 0.333 |
| Outside Dia. | 0.599 |
| Thickness | 0.028 |
| Tooth Length | 0.192 |
| Countersunk Angle | 80–82° |
