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Are there any taps that can be processed by 6H?
6H stands for internal thread accuracy.
Is there a tap that can be processed with a internal thread accuracy 6H in the drawing instructions? It means. Separate information such as size and pitch are required.
internal thread Accuracy 6H is equivalent to Grade 2 in JIS internal thread accuracy after the introduction of ISO. Taps can be used for those aimed at the equivalent of grade 2 (tap accuracy: STD).
It is equivalent to grade 2 for tightening general machinery. 5H (M1.4 or less). Even in 5H, M1.6 or higher is equivalent to Grade 1.
* Screw gauges cannot be shared between Class 2 and 6H. You must use the gauge in the drawing instructions.
| name | Screw Grade (Tolerance Range Class) | |||||
| Thread type | division | |||||
| Metric Thread (M) | external thread | JIS | 4h | 6ｇ | 8g | |
| ISO | ||||||
| internal thread | JIS | 4H、5H | 5H、6H | 7H | ||
| ISO | ||||||
| Unified Screw (U) | external thread | JIS | 3A | 2A | 1A | |
| ISO | ||||||
| internal thread | JIS | 3B | 2B | 1B | ||
| ISO | ||||||
| Wet screw (W) | Level 2 | Level 3 | Level 4 | |||
| use | Screws that require a tight fit | For tightening general machines | General Machinery Chore Screws | Black Skin Bolt | ||