ASME B18.2.2 1/4-20 UNC Hex Nut and Hex Jam Nut
In stock in 6 material, grade and finish combinations.
Dimensions at 1/4-20 UNC
in · ASME B18.2.2 · dimensions from 2015 · current edition 2022| Dimension | Nominal | Min | Max | |
|---|---|---|---|---|
| d | Thread size | 1/4-20 UNC | – | – |
| Basic major diameter | 0.25 | – | – | |
| TPI | Threads per inch | 20 | – | – |
| Thread series | UNC | – | – | |
| Thread class | 2B | – | – | |
| F | Width across flats | – | 0.428 | 0.438 |
| G | Width across corners | – | 0.488 | 0.505 |
| H | Nut height | 0.226 | 0.212 | 0.226 |
| H₁ | Jam nut thickness | – | 0.15 | 0.163 |
- Approx. weight
- ≈ 3.70 kg per 1 000 pieces · Bare steel, before coating and packing.270 pieces per kg