48 NPT : Basic Thread Dimensions (Pitch, minor & major diameters, depth, lead), Tolerance range for all applicable classes and much more. VValue (mm) h: Thread Height: 0.09275 - 0.1: 2.356 - 2.54: L1: L1 gage Tolerance (+/- 1 Turn) 0.125 (Ref) 3.175 (Ref) f: Thread Truncation: 0.0041 - 0.0078: Threadedflange dimensions class 300, 400, 600, 900, up to 24 inch (ASME B16.5) with stud bolts requirements (#bolts, diameter) Bolt circle Diameter mm Holes # Holes Dia. mm Bolt Dia. inch. Length FF Flange Length RF Flange Length RTJ Flange; 1/2: 60.5: 4: 15.7: 1/2: 50.8: Jointingthreads – are pipe threads where pressure-tight joints are made on the threads. The mating of the male and female threads forms the seal. They always use a taper male thread, but can have either parallel or taper female threads. The sealing effect is improved by using a jointing compound. Generalnotes.. Dimensions are in millimeters unless otherwise indicated. Socket Bore (B) - Maximum and Minimum dimensions.Bore Diameter (D) - Maximum and Minimum dimensions.Socket wall thickness - (C) - Average of Socket wall thickness.Dimensional tolerances laying lengths - (E & F)NPS 1/2 and NPS 3/4 = +/- 1.5 mm ExternalPipe NPT Thread Dimensional Data Table, Length specification Table for NPT, ANPT, NPTF, NPTR, NPTG and NPTC pipe threads, Mechanical Tolerances for Taper Pipe Threads . Membership Services. External Pipe NPT Thread Dimensional Data Table . Pipe Size. T.P.I. D. O.D. O.D. of Valve . NPT ANPT NPTR NPTF. NPTG. NPTC. 1/16. NPTNPS threads have a 60° angle and have flattened peaks and valleys (Sellers thread form) where as BSP threads have a 55° angle and have rounded peaks and valleys (Whitworth thread form). NPT and BSP thread pitches (threads per inch) are listed below. To determine pitch, use a thread gauge or count the number of threads that fall into a 1 IqQN.
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    • 1 2 npt thread dimensions in mm