- 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 | Stainless Steel |
| Max Temp. | 800°F |
| Thread Style | Coarse, UNJC-3B |
| Head Style | Hex, Reduced Height |
| Height | 0.125 |
| Hex Size | 5/32" |
| Locking Element | All Metal |
| Mil-Spec | MS21043-04 |
| NAS Spec | NASM21043 |
