| STC046, HSS SOLID CAP SCREW COUNTERBORE, DIN373 |
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| 3-Flute, Material: HSS, HSS-E. |
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| Screw Size | Cutting Diameter | Pilot Diameter | Shank Diameter | Total Length | Flute Number |
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| 1 | 2.2 | 0.75 | 2.2 | 45 | 2 |
| 1.2 | 2.5 | 0.95 | 2.5 | 45 | 2 |
| 1.4 | 2.8 | 1.1 | 2.8 | 45 | 2 |
| 1.6 | 3.3 | 1.25 | 3.3 | 56 | 2 |
| 1.8 | 3.8 | 1.45 | 3.8 | 56 | 2 |
| 2 | 4.3 | 1.6 | 4.3 | 56 | 2 |
| 2.5 | 5 | 2.05 | 5 | 56 | 2 |
| 3 | 6 | 2.5 | 5 | 71 | 3 |
| 3.5 | 6.5 | 2.9 | 5 | 71 | 3 |
| 4 | 8 | 3.3 | 5 | 71 | 3 |
| 4.5 | 9 | 3.7 | 8 | 80 | 3 |
| 5 | 10 | 4.2 | 8 | 80 | 3 |
| 6 | 11 | 5 | 8 | 80 | 3 |
| 7 | 13 | 6 | 12.5 | 100 | 3 |
| 8 | 15 | 6.8 | 12.5 | 100 | 3 |
| 9 | 16 | 7.8 | 12.5 | 100 | 3 |
| 10 | 18 | 8.5 | 12.5 | 100 | 3 |
| 12 | 20 | 10.2 | 12.5 | 100 | 3 |
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| STC044-M, COUNTERSINKS, Straight Shank |
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| GB/T 4258-2004, GOST 14953-80 |
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| Included Angle: 60°, 90°, 120° |
| Size | Small End Diameter | Shank Diameter | Size | Small End Diameter | Shank Diameter |
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| 8 | 1.6 | 8 | 16 | 3.2 | 10 |
| 10 | 2 | 8 | 20 | 4 | 10 |
| 12.5 | 2.5 | 8 | 25 | 7 | 10 |
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| STC044-MT, COUNTERSINKS, Taper Shank |
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| GB/T 1143-2004, GOST 14953-80 |
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| Included Angle: 60°, 90°, 120° |
| Size | Small End Diameter | M.T. Shank | Size | Small End Diameter | M.T. Shank |
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| 16 | 3.2 | 1 | 40 | 12.5 | 3 |
| 20 | 4 | 2 | 50 | 16 | 3 |
| 25 | 7 | 2 | 63 | 20 | 4 |
| 31.5 | 9 | 2 | 80 | 25 | 4 |
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