International Organization for Standardization (ISO)
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ISO 1502:1996
Scope
Gives details for the manufacture and use of gauges for checking ISO general purpose metric screw threads. Specifies the features of gauges which are recommended for checking external and internal screw threads of workpieces. Provides means of distinguishing between threads that comply with the limits of size and those that do not.
ISO 1502:1996 history
1996ISO 1502:1996 ISO general-purpose metric screw threads - Gauges and gauging
1978ISO 1502:1978 ISO general purpose metric screw threads; Gauging