Technical Guidance References N9 to N39 N N Technical Guidance Turning Edition ..................................................... N10 Milling Edition ....................................................... N15 Endmilling Edition ............................................... N19 Drilling Edition ......................................................N22 SUMIBORON Edition ...........................................N27 References SI Unit Conversion List .......................................N31 Steel and Non-Ferrous Metal Symbols Chart (1) ....N32 Steel and Non-Ferrous Metal Symbols Chart (2) ....N33 Hardness Scale Comparison Chart ..................N34 N Technical Guidance / Standard of Tapers ...............................................N35 References Dimensional Tolerances for Regularly Used Fits ........N36 Dimensional Tolerances and Fits ......................N38 Finished Surface Roughness ............................N39 N9