Overview
BS 3643-2 specifies the fundamental deviations, tolerances and limits of size for the tolerance classes 4H, 5H, 6H and 7H for internal threads and 4h, 6g and 8g for external threads where
appropriate for:
- a coarse pitch series with the range 1 mm to 68 mm diameter
- a fine pitch series with the range 1 mm to 33 mm diameter
- a constant pitch series with the range 8 mm to 300 mm diameter.
For certain diameter/pitch combinations, the fundamental deviations, tolerances and limits of size for tolerance class 4H for internal threads and tolerance classes 6h and 4g for external threads, primarily for aerospace use, are specified.
BS 3643-2:2007 supersedes BS 3643-2:1981, which is withdrawn.
Bibliographic Detail
| Standard Number | BS 3643-2:2007 |
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| Title | ISO metric screw threads. Specification for selected limits of size |
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| Status | Current |
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| Publication Date | 30 November 2007 |
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| Cross References | BS 3643-1:2007, PD 6494 |
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| Replaces | BS 3643-2:1981 |
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| Descriptors | ISO metric threads, Thread forms, Threads, Nuts, Bolts, Diameter, Dimensions, Thread pitch, Size, Dimensional tolerances, Aircraft components |
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| ICS | 21.040.10 (Metric screw threads)
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| Title in French | Filetages metriques ISO. Specification pour la selection de dimensions limites |
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| Title in German | Metrisches ISO-Gewinde. Spezifikation fuer die Uebersicht der Grenzmasse |
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| Committee | FME/9 |
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| ISBN | 978 0 580 57925 7 |
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| Publisher | BSI |
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| Format | A4 |
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| Delivery | YES |
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| Pages | 48 |
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| File Size | 531 KB |
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| Price | £ 134.00 |
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