21.040 - Screw threads
Show all standards in this group (36)
| ICS | Field | Number of standards |
|---|---|---|
| 21.040.01 | Screw threads in general | 4 |
| 21.040.10 | Metric screw threads | 16 |
| 21.040.20 | Inch screw threads | 2 |
| 21.040.30 | Special screw threads | 14 |
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