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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.
For a taper thread, it is the diameter at the "gauge length" (plus/minus one thread pitch) from the small end of the thread. The taper is 1:16, meaning that for each 16 units of measurement increase in the distance from the end, the diameter increases by 1 unit of measurement.
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.
27 gru 2022 · First, find the thread’s inner diameter to determine the threads per inch count for the BSPT fittings. Use a vernier caliper to take a reading from inside the bore of the fitting. Then, cross check the bore size with thread pitch and threads per inch given in Tables 1-3 to find the desired size and its related specifications.
nominal thread size (inch) major diameter (mm) minor diameter (mm) tpi g 1/16 g 1/8 g 1/4 g 3/8 g 1/2 g 3/4 g 1 g 2 g 3 6.561 8.566 11.445 14.950 18.631 24.117
