| Technology | |||
 Screws |
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| Stamping Parts |
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| Machined Parts |
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| Pins |
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| Bolts |
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| Nuts |
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| Washers |
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| Rivets |
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| Hex Wrench |
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| Metric Threads Specification |
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| Screw Basic Knowledge |
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| Plastic & Nylon Parts |
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Technology
Hi-Low Threads Specification
| Specification | Pitch | High Thread Dia. | Low Thread Dia. | Minor Dia. |
| 3.5 | 1.34 | 3.43 -3.68 | 2.74 | 2.0 |
| 4.0 | 1.34 | 3.76 - 4.01 | 3.30 | 2.3 |
| 4.2 | 1.41 | 4.06 - 4.32 | 3.30 | 2.4 |
| 4.8 | 1.59 | 4.70 - 4.95 | 3.68 | 2.6 |
| 5.3 | 1.59 | 5.03 - 5.33 | 3.81 | 2.9 |
| 5.5 | 1.59 | 5.33 - 5.59 | 4.24 | 3.5 |
| 6.0 | 1.59 | 5.84 - 6.10 | 4.83 | 3.7 |
| 6.3 | 1.69 | 6.35 - 6.60 | 5.08 | 4.2 |
| 7.2 | 1.69 | 6.98 - 7.24 | 5.84 | 4.8 |
| 7.5 | 1.69 | 7.24 - 7.49 | 6.10 | 5.1 |
| 8.0 | 1.81 | 7.80 - 8.35 | 6.35 | 5.3 |
