用于螺纹千分尺测量后或开始前的准确调零。
| 货号 | 长度 | 精度 |
| 公制型 (统一) θ = 60º | ||
| 167-261 | 25mm | ±4µm |
| 167-262 | 50mm | ±5µm |
| 167-263 | 75mm | ±6µm |
| 167-264 | 100mm | ±7µm |
| 167-265 | 125mm | ±8µm |
| 167-266 | 150mm | ±9µm |
| 167-267 | 175mm | ±10µm |
| 167-268 | 200mm | ±11µm |
| 167-269 | 225mm | ±12µm |
| 167-270 | 250mm | ±13µm |
| 167-271 | 275mm | ±14µm |
| 惠氏型 θ = 55º | ||
| 167-272 | 25mm | ±4µm |
| 167-273 | 50mm | ±5µm |
| 167-274 | 75mm | ±6µm |
| 167-275 | 100mm | ±7µm |
| 167-276 | 125mm | ±8µm |
| 167-277 | 150mm | ±9µm |
| 167-278 | 175mm | ±10µm |
| 167-279 | 200mm | ±11µm |
| 167-280 | 225mm | ±12µm |
| 167-281 | 250mm | ±13µm |
| 167-282 | 275mm | ±14µm |
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