ASME B 18.2.1 - 2012
Display drawing:
| Screw Thread | 2-1/2 | ||
| Nominal Diameter | 2-1/2 | ||
| P | 4 | ||
| Ds | Max | 2.559 | |
| Ds | Min | 2.461 | |
| S | Max | 3.875 | |
| S | Min | 3.75 | |
| E | Max | 4.474 | |
| E | Min | 4.275 | |
| K | Max | 1.708 | |
| K | Min | 1.479 | |
| R | Max | 0.19 | |
| R | Min | 0.06 | |
| B | L≤6 | 5.25 | |
| B | L>6 | 5.5 | |