Weidmueller SCREWTY M12 KO O. SD

Therefore, "SCREWTY M8F KO O. SD" most likely describes a precision tool (possibly a tap, die, or specialized driver) for M8 fine threads. The "KO" and "O. SD" parts are likely product codes or specifications unique to the manufacturer. To get the precise definition and specifications, you would need to consult the manufacturer's documentation or catalog.  It's very likely that the tool is part of a set or kit given the "SCREWTY" designation.