ASME B18.2.1 1-8 UNC x 4 Hex Cap Screw
In stock in 6 material, grade and finish combinations.
Dimensions at 1-8 UNC x 4
in · ASME B18.2.1 · 2012 (R2021) edition| Dimension | Nominal | Min | Max | |
|---|---|---|---|---|
| d | Thread size | 1-8 UNC | – | – |
| L | Length | 4 | – | – |
| Basic major diameter | 1 | – | – | |
| TPI | Threads per inch | 8 | – | – |
| Thread series | UNC | – | – | |
| Thread class | 2A | – | – | |
| E | Body diameter | – | 0.99 | 1 |
| F | Width across flats | – | 1.469 | 1.5 |
| G | Width across corners | – | 1.675 | 1.732 |
| H | Head height | – | 0.591 | 0.627 |
| J | Wrenching height | – | 0.416 | – |
| LT | Thread length (L≤6 in) | 2.25 | – | – |
| LT | Thread length (L>6 in) | 2.5 | – | – |
- Length under head
- 4 in
- Approx. weight
- ≈ 520.83 kg per 1 000 pieces · Bare steel, before coating and packing.1.9 pieces per kg
Holes for this thread
ISO 273 · ISO 2306Tap drill7/8 (0.8750 in)
Other lengths in 1-8 UNC
All 143 sizes of Hex Cap Screw ASME B18.2.1StandardsASME B18.2.1All sizes