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G-Series pipe thread chart (British standard pipe parallel was BSPP & BSPF) and PF-Series pipe thread chart (Japanese pipe parallel).
BSPP G 1/4 : Brith Pipe (BSP) Thread Dimensions and Tolerances. All the relevant data for this tread in one spot.
Gauge Length: Because of the taper angle, the diameters (major, minor, and pitch) change as we move along the thread’s axis. The gauge length is an arbitrary distance from the thread’s end at which the measurements of diameters are made.
The BSPT thread chart calculator shows sizes, dimensions, tolerances and designation for jointing pipe threads for thread sizes from 1/16 to 6 according to ISO 7-1 standard. The thread form follows the British Standard Whitworth thread.
British Standard Pipe Taper (BSPT) Threads Size Chart. Thread size. Threads per inch. Pitch [mm] Major diameter of the thread. Gauge length [mm] Corresponding pipe.
To get an accurate value, ensure that the thread pitch gauge is fitting well on the threads. Record the values and compare your measurements with the figures provided in this guide. Accurate measurement of four-bolt flanges. Begin by using a caliper to measure the port hole diameter the bolt.
Thread Pitch Gauge: Used to measure the number of threads per inch, as well as thread to thread spacing in the case of metric connections. Before you begin measuring, be sure the threads are in good condition.
