The International Organization for Standardization (ISO). This ISO document is a Final Draft International Standard. ISO/TC 2/SC
10. Voting begins on: 2011-01-27, Voting terminates on: 2011-03-27.14p. This International Standard specifies the characteristics of heat-treated steel tapping screws, with tapping screw thread from ST2,2 to ST9,5 inclusive according to ISO 1478, together with the corresponding test methods.