- 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 | #4-40 |
| Material | Carbon Steel |
| Max Temp. | 450° F |
| Thread Style | Coarse, UNJC-3B |
| Head Style | Hex |
| Height | 0.167 |
| Tensile Strength | 125,000 psi |
| Lubricant | Soluble Lubricant |
| Locking Element | All Metal |
| Mil-Spec | MS21045-04 |
| NAS Spec | NASM21045 |
