Historical & Obsolete
French Metric Thread (SF)
Threads that have been withdrawn or superseded. Listed for repair, restoration and reverse-engineering of older equipment.
- Flank angle
- 60°
- Sizes listed
- 34
- Range
- 0 – 19
| Thread- No. | Nominal Diameter mm | Pitch mm | Tapping Drill Size mm |
|---|---|---|---|
| 0 | 6.00 | 1.00 | 4.70 |
| - | 8.00 | 1.00 | 6.70 |
| 1 | 10.00 | 1.50 | 8.05 |
| - | 12.00 | 1.50 | 10.05 |
| 2 | 14.00 | 2.00 | 11.40 |
| - | 16.00 | 2.00 | 13.40 |
| 3 | 18.00 | 2.50 | 14.75 |
| - | 20.00 | 2.50 | 16.75 |
| - | 22.00 | 2.50 | 18.75 |
| 4 | 24.00 | 3.00 | 20.10 |
| - | 26.00 | 3.00 | 22.10 |
| - | 28.00 | 3.00 | 24.10 |
| 5 | 30.00 | 3.50 | 25.45 |
| - | 32.00 | 3.50 | 27.45 |
| - | 34.00 | 3.50 | 29.45 |
| 6 | 36.00 | 4.00 | 30.80 |
| - | 38.00 | 4.00 | 32.80 |
| - | 40.00 | 4.00 | 34.80 |
| 7 | 42.00 | 4.50 | 36.15 |
| - | 44.00 | 4.50 | 38.15 |
| - | 46.00 | 4.50 | 40.15 |
| 8 | 48.00 | 5.00 | 41.50 |
| - | 50.00 | 5.00 | 43.50 |
| 9 | 56.00 | 5.50 | 48.85 |
| 10 | 64.00 | 6.00 | 56.20 |
| 11 | 72.00 | 6.50 | 63.55 |
| 12 | 80.00 | 7.00 | 70.90 |
| 13 | 88.00 | 7.50 | 78.25 |
| 14 | 96.00 | 8.00 | 85.60 |
| 15 | 106.00 | 8.50 | 95.95 |
| 16 | 116.00 | 9.00 | 104.30 |
| 17 | 126.00 | 9.50 | 113.65 |
| 18 | 136.00 | 10.00 | 123.00 |
| 19 | 148.00 | 10.50 | 134.05 |
Reference values only. Verify against the current edition of the governing standard before use in production drawings or manufacturing. Provided by Micro Components as a free engineering resource.