Общий каталог Yamawa 2021 - страница 710

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22. Basic Profile of Threads Intro American Standard Taper Pipe Threads (NPT) Truncation Unit: mm Threads SP per inch Section fc = fr Internal Max. 0.096P Threads Threads per inch 27 Min. 0.033P Max. 0.088P 18 Min. 0.033P SL Max. 0.078P 14 Min. 0.033P Central axis Max. 0.073P 11.5 External Threads line of thread Min. 0.033P Max. 0.062P PO 8 Min. 0.033P Dryseal American Standard Taper Pipe Threads (NPTF) Truncation Unit: mm ST Threads per inch Section fc fr Internal Max. 0.094P 0.140P Threads Threads per inch 27 Min. 0.047P 0.094P Max. 0.078P 0.109P ROLL 18 Min. 0.047P 0.078P Max. 0.060P 0.085P 14 Min. 0.036P 0.060P Central axis Max. 0.060P 0.090P External Threads line of thread 11.5 Min. 0.040P 0.060P CARBIDE Max. 0.055P 0.076P 8 Min. 0.042P 0.055P LONG Metric Trapezoidal Screw Threads (Tr) 29˚ Trapezoidal Screw Threads (29 Tr) HAND TAPS Internal Thread Internal EG (STI) Threads External Threads SPECIAL THREADS, GAUGES External Thread d2 or D2 d1 or D1 d2 or D2 d or D THREAD D1 d1 D d MILLS DIES Threads per inch CENTER DRILLS Technical info 711