BS 46-3:1951

Co-operating organizations
Foreword
1 General
2 Material
3 Manufacture
4 Dimensions
5 Limits of tolerance on dimensions
6 Hardness test
7 Bend test
8 Number of hardness and bend tests
9 Packaging
10 Inspection
11 Testing facilities
Appendix A - Solid and split taper pins maximum and
             minimum diameters at small end (preferred
             sizes only)
Appendix B - Comparison of British Standard fractional
             size taper pins and number size taper pins

Four classes; chemical and physical properties of the material; solid and split pin dimensions from $9A x ⅜ in to ⅞ x 8 in; reference by larger diameter compared with non-preferred reference by number. Data on selection of drill sizes in appendices.