| 线材直径d/mm | 0.03 | 0.04～0.09 | 0.10 | 0.11～0.30 | 0.31～0.50 | 0.53～0.60 | 0.61～1.00 | 1.05～3.00 | 3.10～6.00 | |
| 允 许偏 差 | 4级 | -0.004 | -0.008 | -0.13 | -0.015 | -0.018 | -0.020 | -0.025 | ||
| 5级 | -0.005 | -0.010 | -0.020 | -0.025 | -0.030 | -0.040 | -0.050 | |||
| 6级 | — | -0.035 | -0.040 | -0.045 | -0.060 | -0.080 | ||||
| 抗拉强度σb/MPa | 883～1 324 | 834～1 079 | 735～981 | 637～882 | ||||||