International Organization for Standardization (ISO)
Latest
ISO 504:1975
Scope
This International Standard specifies the designation and marking of turning tools with carbide tips, metric series, covered by ISO 243 and ISO 514, which relate to external tools and internal tools respectively.
The designating numbers for "type of tool" are those which appear in these International Standards.
The designating symbols for "groups of application" are those of ISO 513.
ISO 504:1975 history
1975ISO 504:1975 Turning tools with carbide tips; Designation and marking