- Heavy Duty Locknuts withstand higher temperatures than nylon insert locknuts
- Top thread section is deformed to create two or three locking zones
- They start easily by hand, then must be wrenched into final position
| Type | Nut |
| Style | Heavy Duty Lock |
| Size | 5/8"-18 |
| Material | Carbon Steel |
| Grade/Class | C |
| Thread Direction | Right Hand |
| Thread Type | SAE / UNF (Fine) |
