Hex Bolts [Table 2] (ASTM A307 / A354 / A394)
ASME B 18.2.1 - 2012
Display drawing:
| Screw Thread | 1/4 | ||
| Thread Size | 1/4 | ||
| D | 0.25 | ||
| PP | UNC | 20 | |
| PP | UNF | 28 | |
| PP | UN | None | |
| Ds | Max | 0.26 | |
| Ds | Min | 0.237 | |
| S | Max | 0.438 | |
| S | Min | 0.425 | |
| E | Max | 0.505 | |
| E | Min | 0.484 | |
| K | Max | 0.188 | |
| K | Min | 0.15 | |
| R | Max | 0.030 | |
| R | Min | 0.010 | |
| B | L≤6 | 0.7500 | |
| B | L＞6 | 1.0000 | |