Pipe thread sizes – BSP Threads Corresponding pipe
pipe thread sizes BSP Threads A list of 15 thread sizes are defined by the standards, ranging from 1/16 to 6 . The size number was originally based on the inner diameter measured in inches ( mm) of a steel tube for which the thread was intended, but is in the modern metric version of the standard simply a size number. Major diameter of the thread Corresponding pipe thread size BSP Threads per inch Pitch [mm] [mm] Measured across the male thread Gauge length [mm] DN OD [mm] OD [in] Thick- ness [mm] 1/16 28 4 1/8 28 4 6 2 1/4 19 6 8 3/8 19 10 1/2 14 15 3/4 14 20 1 11 25 1 11 32 1 11 40 2 11 50 2 11 65 3 11 80 4 4 11 100 5 11 125 5 6 11 150 5 The major diameter listed is the outer diameter of the external thread . For a taper thread , it is the diameter at the "gauge length" from the small end of the thread .
Pipe thread sizes – BSP Threads A list of 15 thread sizes are defined by the standards, ranging from 1/16” to 6”. The size number was originally based on the inner diameter measured in inches (25.4
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