ISO A Industrial Interchange Working and Burst Pressures
Connected Steel Coupler and Steel Plug
| Body Size | Maximum Working (psi) | Burst (psi) |
| 1/4 | 5000 | 18,270 |
| 3/8 | 4000 | 18,270 |
| 1/2 | 4000 | 16,500 |
| 3/4 | 4000 | 14,800 |
| 1 | 4000 | 12,400 |
| 1-1/4 | 3000 | 12,600 |
| 1-1/2 | 3000 | 12,600 |
| 2 | 1450 | 5800 |
