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British Std Pipe

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Total record count: 42.

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British Standard Pipe Threads BSP threads are fairly uncommon in the workshop but widely used in the home where most U.K. and European plumbing fittings use these threads. The threads are sized not on diameter but on the nominal bore of the pipe to which they are applied. Just to be really odd a ½" pipe doesn′t necessarily have a ½" bore because wall thickness varies with the pressure rating of the pipe. Angle of thread = 55 deg

 

 

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Actions Size Tpi Pitch mm Major Dia Inch Major Dia Mm Core Dia Inch Core Dia Mm Guage Length Inch Guage Length Mm Tapping Drill Size Mm R95% Tapping Drill Size Mm R80%
​1⁄16 28 0.907 0.304 7.723 0.258 6.561 5⁄32 4.000 6.6 6.8
​1⁄8 28 0.907 0.383 9.728 0.337 8.566 5⁄32 4.000 8.6 8.8
​1⁄4 19 1.337 0.518 13.157 0.451 11.445 0.236 6.000 11.5 11.8
​3⁄8 19 1.337 0.656 16.662 0.589 14.950 1⁄4 6.400 15.0 15.3
​1⁄2 14 1.814 0.825 20.955 0.734 18.631 0.321 8.200 18.7 19.1
​5⁄8 14 1.814 0.902 22.911 0.811 20.587 0.321 8.200 20.7 21.1
​3⁄4 14 1.814 1.041 26.441 0.950 24.117 3⁄8 9.500 24.2 24.6
​7⁄8 14 1.814 1.189 30.201 1.098 27.877 3⁄8 9.500 28.0 28.3
1 11 2.309 1.309 33.249 1.193 30.291 0.409 10.400 30.4 30.9
​1 1⁄8 11 2.309 1.492 37.897 1.376 34.939 0.409 10.400 35.1 35.5
​1 1⁄4 11 2.309 1.650 41.910 1.534 38.952 1⁄2 12.700 39.1 39.5
​1 3⁄8 11 2.309 1.745 44.323 1.629 41.365 1⁄2 12.700 41.5 42.0
​1 1⁄2 11 2.309 1.882 47.803 1.766 44.845 1⁄2 12.700 45.0 45.4
​1 5⁄8 11 2.309 2.082 52.883 1.966 49.926 5⁄8 15.900 50.1 50.5
​1 3⁄4 11 2.309 2.116 53.746 2.000 50.788 5⁄8 15.900 50.9 51.4
​1 7⁄8 11 2.309 2.244 56.998 2.128 54.041 5⁄8 15.900 54.2 54.6
2 11 2.309 2.347 59.614 2.231 56.656 5⁄8 15.900 56.8 57.2
​2 1⁄4 11 2.309 2.587 65.710 2.471 62.752 11⁄16 17.500 62.9 63.3
​2 1⁄2 11 2.309 2.960 75.184 2.844 72.226 11⁄16 17.500 72.4 72.8
​2 3⁄4 11 2.309 3.210 81.534 3.094 78.576 13⁄16 20.600 78.7 79.2
3 11 2.309 3.460 87.884 3.344 84.926 13⁄16 20.600 85.1 85.5
​3 1⁄4 11 2.309 3.700 93.980 3.584 91.022 7⁄8 22.200 91.2 91.6
​3 1⁄2 11 2.309 3.950 100.330 3.834 97.372 7⁄8 22.200 97.5 98.0
​3 3⁄4 11 2.309 4.200 106.680 4.084 103.722 7⁄8 22.200 103.9 104.3
4 11 2.309 4.450 113.030 4.334 110.072 1 25.400 110.2 110.7
​4 1⁄2 11 2.309 4.950 125.730 4.834 122.772 1 25.400 122.9 123.4
5 11 2.309 5.450 138.430 5.334 135.472 1 1⁄8 28.600 135.6 136.1
​5 1⁄2 11 2.309 5.950 151.130 5.834 148.172 1 1⁄8 28.600 148.3 148.8
6 11 2.309 6.450 163.830 6.334 160.872 1 1⁄8 28.600 161.0 161.5
7 10 2.540 7.450 189.230 7.322 185.979 1 3⁄8 34.900 186.1 186.6

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