ISO 2284-2017 pdf free.Hand taps for parallel and taper pipe threads – General dimensions and marking. The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 237, Rotating tools with parallel shanks一Diameters of shanks and sizes of driving squares IS0 5969, Ground thread taps for pipe threads G series and Rp series一Tolerances on the threaded portion. 3 Terms and definitions No terms and definitions are listed in this document. ISO and IEC maintain terminological databases for use in standardization at the following addresses: 一IEC Electropedia: available at http://www.electropedia.org/ 一ISO Online browsing platform: available at http://www.iso.org/obp 4 General dimensions The general dimensions are given in Table 1 and Table 2. Shank diameters and driving squares shall conform to the specifications given in ISO 237, the tolerances being as follows: 一on diameter, d1:h9 for precision shanks;h11 for other shanks; 一on width across flats, a:h1; h12 (including errors of form of the square and of its position in relation to the shank). Taps in accordance with…