- 5/16‑24 UNJF self‑locking castle nut for 5/16‑inch aircraft bolts where additional security is required
- Steel, cadmium‑plated nut with nylon prevailing‑torque insert rated to 250 deg F
- Hex, castellated configuration for use with a cotter pin plus self‑locking feature to resist vibration loosening
| Type | Nut |
| Style | Self‑Locking Slotted with Nylon Insert |
| Size | 5/16" |
| Material | Carbon Steel |
| Max Temp. | 250 deg F |
| Thread Style | UNJF, 5/16-24, right‑hand |
| Head Style | Self‑locking castellated hexagon |
| Height | 0.31" |
| Locking Element | Secured with Cotter Pin |
| Mil-Spec | MS17825-5 |
