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UNC of UNF, hoe zit dat nou met die bouten en moeren? Hierbij de tabel met de verhoudingen tussen Breedte (Width) UNF en UNC.
| Width | National Fine (Threads per Inch) | National Coarse (Threads per Inch) |
| #10 | 32 | 24 |
| #12 | 28 | 24 |
| 1/4 | 28 | 20 |
| 5/16 | 24 | 18 |
| 3/8 | 24 | 16 |
| 7/16 | 20 | 14 |
| 1/2 | 18 | 13 |
| 9/16 | 18 | 12 |
| 5/8 | 18 | 11 |
| 3/4 | 16 | 10 |
| 7/8 | 14 | 9 |
| 1 | 12 | 8 |
| 1-1/8 | 12 | 7 |
| 1-1/4 | 12 | 7 |
| 1-3/8 | 12 | 6 |
| 1-1/2 | 12 | 6 |
Bron:http://gotayloronline.com/index.php/threading-national-coarse-unc-vs-national-fine-unf/
