Max: Major Dia. Min: Major Dia. Max: Pitch Dia. Min: Pitch Dia. Tc (Max) Tc (Min) Max: ※ Minor Dia. Tr (Max) Tr (Min) Description of productsTechnical Information 21. Taps for Pipe Threads ○Classi cation of American pipe thread taps Designation Symbol Class Material Threads to be cut Range Straight Pipe Thread Tap 1/ 8 Dryseal Straight Pipe Thread Tap 1/ 8 3/ 4 Taper Pipe Thread Tap 1/ 16 Dryseal Taper Pipe Thread Tap 1/ 16 ■Thread limit of American Pipe Thread Taps ○Straight pipe thread taps for (NPS) G Class Unit : mm Major diameter Pitch diameter Minor diameter※ Size Max. Min. Tolerance Max. Min. Tolerance Max. ※ : Above dimensions change depending on actually measured. ○Taper pipe thread taps (NPT) G Class Fc (Max) Fc (Min) Fr (Max) Fr (Min) Axis of tap Taper Technical-68