- 1/4‑28 UNF castellated shear nut with approximately half the tensile rating of an AN310 nut
- Carbon steel, cadmium plated per QQ‑P‑416 Type II Class 3 for corrosion resistance
- Thin‑section castle nut used with clevis bolts and taper pins that carry shear loads only, secured by cotter pin
| Type | Nut |
| Style | Shear Castellated Hexagon |
| Size | 1/4" |
| Material | Carbon Steel |
| Max Temp. | Not Rated |
| Thread Style | UNF, 1/4‑28, right‑hand |
| Head Style | Plain castellated hexagon |
| Height | 0.19" |
| Locking Element | Secured with Cotter Pin |
| Mil-Spec | AN320-4 |
