美式货钩参数：
| 额定载荷 | A | B | C | D | E | 重量 | |
| 320C | 320A | in | in | in | in | in | ibs/pc |
| 0.5 | 0.75 | 0.63 | 0.87 | 2.80 | 0.81 | 0.65 | 0.35 |
| 0.75 | 1 | 0.75 | 0.94 | 3.22 | 0.88 | 0.81 | 0.55 |
| 1 | 1.5 | 0.91 | 1.03 | 3.66 | 0.97 | 0.81 | 0.75 |
| 1.5 | 2 | 1.12 | 1.06 | 4.09 | 1.00 | 0.84 | 1.25 |
| 2 | 3 | 1.25 | 1.22 | 4.69 | 1.12 | 1.19 | 1.70 |
| 3 | 4.5 | 1.56 | 1.50 | 5.78 | 1.34 | 1.38 | 3.60 |
| 5 | 7 | 2.00 | 1.88 | 7.38 | 1.69 | 1.78 | 7.08 |
| 7.5 | 11 | 2.44 | 2.06 | 9.06 | 2.06 | 2.12 | 13.00 |
| 10 | 15 | 2.84 | 3.25 | 10.19 | 2.27 | 2.62 | 21.60 |
