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immediate downloadReleased: 2014-06-30
BS 3643-2:2007
ISO metric screw threads Specification for selected limits of size
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| Standard number: | BS 3643-2:2007 |
| Pages: | 48 |
| Released: | 2014-06-30 |
| ISBN: | 978 0 580 86558 9 |
| Status: | Standard |
DESCRIPTION
BS 3643-2:2007
This standard BS 3643-2:2007 ISO metric screw threads is classified in these ICS categories:
- 21.040.10 Metric screw threads
This part of this BS 3643 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 in Annex A.