Thread Data Charts

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INDEX of THREAD DATA CHARTS

G-SERIES PIPE THREAD (BRITISH STANDARD PIPE PARALLEL was BSPP & BSPF) PF-SERIES PIPE THREAD (JAPANESE PIPE PARALLEL)

Pipe Thread BSP (JIS PF)
British Pipe Thread ( Whitworth Form) -- Parallel (BSPP/BSPF)
Thread Designation Nominal Size Thread Form Type Major Diameter mm d=D Pitch mm p Threads per inch Pitch Diameter mm d2=D2 Minor Diameter Male Thd. d3 Thread Height H1 Tap Drill Diameter mm
G1/8 1/8" BSPP 9.728 0.907 28 9.147 8.566 0.581 8.70
G1/4 1/4" BSPP 13.157 1.337 19 12.301 11.445 0.856 11.60
G3/8 3/8" BSPP 16.662 1.337 19 15.806 14.950 0.856 15.00
G1/2 1/2" BSPP 20.955 1.814 14 19.793 18.631 1.162 19.00
G5/8 5/8" BSPP 22.911 1.814 14 21.749 20.587 1.162 20.75
G3/4 3/4" BSPP 26.441 1.814 14 25.279 24.117 1.162 24.50
G7/8 7/8" BSPP 30.201 1.814 14 29.039 27.877 1.162 28.00
G1 1" BSPP 33.249 2.309 11 31.770 30.291 1.479 30.50
G1-1/8 1-1/8" BSPP 37.897 2.309 11 36.418 34.939 1.479 35.00
G1-1/4 1-1/4" BSPP 41.910 2.309 11 40.431 38.952 1.479 39.50
G1-3/8 1-3/8" BSPP 44.323 2.309 11 42.844 41.365 1.479 41.50
G1-1/2 1-1/2" BSPP 47.803 2.309 11 46.324 44.845 1.479 45.00
G1-3/4 1-3/4" BSPP 53.746 2.309 11 52.267 50.788 1.479 51.00
G2 2" BSPP 59.614 2.309 11 58.135 56.656 1.479 57.00
G2-1/4 2-1/4" BSPP 65.71 2.309 11 64.231 62.752 1.479 63.00
G2-1/2 2-1/2" BSPP 75.184 2.309 11 73.705 72.226 1.479 72.50
G2-3/4 2-3/4" BSPP 81.534 2.309 11 80.055 78.576 1.479 79.00
3 3" BSPP 87.884 2.309 11 86.405 84.926 1.479 85.50
G3-1/4 3-1/4" BSPP 93.98 2.309 11 92.501 91.022 1.479 91.00
G3-1/2 3-1/2" BSPP 100.33 2.309 11 98.351 97.372 1.479 97.75
G3-3/4 3-3/4" BSPP 106.68 2.309 11 105.201 103.722 1.479 104.00
G4 4" BSPP 113.03 2.309 11 111.55 110.072 1.479 110.50
G4-1/2 4-1/2" BSPP 125.73 2.309 11 124.251 122.772 1.479 123.00
G5 5" BSPP 138.43 2.309 11 136.951 135.472 1.479 136.00
G5-1/2 5-1/2" BSPP 151.13 2.309 11 149.651 148.172 1.479 148.50
G6 6" BSPP 163.83 2.309 11 162.351 160.872 1.479 161.50

Disclaimer This data is provided for general information only. The intention is to provide accurate information; regardless; errors may exist in the supplied information. If accuracy is critical, base your final decisions on the data provided in the root document: ISO 228; which is a copyrighted document. To purchase a copy visit an Authorized Reseller.

Comments: Original Posting: 2/28/2008 Last Revision: 2/12/2013 Error corrections in, or comments about, the above data can be sent to: office@gagecrib.com

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