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Crowns by Brand—
Seiko
Genuine Seiko
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High Quality Generic Seiko
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Reg Quality Generic Seiko
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Tap Size Reference Chart |
|
| mm Size | Tap Size |
| 0.60 | 13 |
| 0.70 | 12 |
| 0.80 | 11 |
| 0.90 | 10 |
| 1.00 | 9 |
| 1.10 | 8 |
| 1.20 | 7 |
| 1.30 | 6 |
| 1.40 | 5 |
| 1.50 | 4 |
| 1.60 | 3 |
| 1.70 | 2 |
| 1.80 | 1 |
| 1.90 | 0 |