Like distorted-thread nuts, these locknuts can tolerate high vibration levels and are reusable. When tightened, the top prongs bend to generate tension for a firm grip. The prongs of the locknut return to their original shape when you remove it, allowing you to reinstall it without losing its gripping ability. Fuji locknuts are another name for them.
These locknuts are almost half as robust as medium-strength steel nuts and are rated Grade 2, Class 6, or lower. In order to prevent thread stripping during installation, use them with screws that have a comparable strength grade.
These rust-resistant locknuts are ideal for outdoor and damp settings.