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ICS
21
21.040
Screw threads
Screw threads for aerospace construction, see
49.030.10
ICS
Field
21.040.01
Screw threads in general
21.040.10
Metric screw threads
21.040.20
Inch screw threads
Including Whitworth screw threads
Pipe threads, see
21.040.30
21.040.30
Special screw threads
Including miniature screw threads, pipe threads, etc.