This standard was last reviewed and confirmed in 2022. Therefore this version remains current.
Specifies the dimensions for seven nominal sizes. This third edition cancels and replaces the second edition (1985), which has been technically revised (addition of round drill steels and extension of the range of sizes).
Status: PublishedPublication date: 1991-02
Edition: 3Number of pages: 2
Technical Committee: ISO/TC 82 Mining
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|std 1 40|
|std 2 40||Paper|