- Self-locking nuts have a reduced height and are used in limited space applications where access is a problem
- These nuts are rated at a max temperature of 450° F and have a tensile strength of 160,000 psi
| Type | Nut |
| Style | Self-Locking |
| Size | 0.2500-28 (1/4-28) |
| Material | Steel |
| Max Temp. | 450° F |
| Thread Style | Fine, UNJF-3B |
| Head Style | Hex, Reduced Height |
| Height | 0.219 |
| Lubricant | Not Dry Film Lubricated |
| Tensile Strength | 160,000 psi |
| Locking Element | All Metal |
| Mil-Spec | MS21042-4 |
| NAS Spec | NASM21042 |
