10. Tap Thread Limits (JIS, DIN, ANSI) Intro Whitworth Threads (BSW) Unit: mm Parallel Pipe Threads G(BSP) Unit: mm SP Majordiameter Pitch Diameter Minordiameter Majordiameter Pitch Diameter MinordiameterSizeClassBasicSizeBasicSizeUpperLowerTolerance Tolerance(μm) +(μm) +BasicSizeSizeClassBasicSizeBasicSizeUpperLowerTolerance Tolerance(μm) +(μm) +BasicSize 1/8 W 40 P1 3.175 2.768 25 10 2.362 G 1/8 - 28 - 9.728 9.147 43 21 8.566 5/32 W 32 P2 3.969 3.460 40 20 2.952 G 1/4 - 19 - 13.157 12.301 50 25 11.445 SL 3/16 W 24 P2 4.762 4.085 40 20 3.407 G 3/8 - 19 - 16.662 15.806 50 25 14.950 7/32 W 24 P2 5.556 4.879 40 20 4.201 G 1/2 - 14 - 20.955 19.793 57 28 18.631 1/4 W 20 P2 6.350 5.537 40 20 4.724 G 5/8 - 14 - 22.911 21.749 57 28 20.587 5/16 W 18 P2 7.938 7.034 40 20 6.130 G 3/4 - 14 - 26.441 25.279 57 28 24.117 PO 3/8 W 16 P2 9.525 8.509 40 20 7.493 G 7/8 - 14 - 30.201 29.039 57 28 27.877 7/16 W 14 P3 11.112 9.950 60 40 8.788 G 1 - 11 - 33.249 31.770 72 36 30.291 1/2 W 12 P3 12.700 11.345 60 40 9.990 G 1 1/4 - 11 - 41.910 40.431 72 36 38.952 9/16 W 12 P3 14.288 12.933 60 40 11.578 G 1 1/2 - 11 - 47.803 46.324 72 36 44.845 ST 5/8 W 11 P3 15.875 14.396 60 40 12.917 3/4 W 10 P3 19.050 17.424 60 40 15.798 Parallel Pipe Threads PF(G) Unit: mm 7/8 W 9 P3 22.225 20.418 60 40 18.611 1 W 8 P3 25.400 23.367 60 20 21.334 Majordiameter Pitch Diameter Minordiameter ROLL 1 1/8 W 7 P4 28.575 26.252 80 40 23.9291 1/4W7P431.75029.427804027.104Size Class BasicSizeBasicSizeUpper LowerTolerance Tolerance(μm) +(μm) +BasicSize 1 3/8 W 6 P4 34.925 32.214 80 40 29.503 PF 1/16 - 28 II 7.723 7.142 40 20 6.561 1 1/2 W 6 P4 38.100 35.389 80 40 32.678 PF 1/8 - 28 II 9.728 9.147 40 20 8.566 1 5/8 W 5 P4 41.275 38.022 80 40 34.769CARBIDE1 3/4W5P444.45041.197804037.944PF1/4 - 19II13.15712.301 50 25 11.445PF3/8 - 19II16.66215.806502514.950 1 7/8 W 4.5 P4 47.625 44.011 80 40 40.397 PF 1/2 - 14 II 20.955 19.793 55 25 18.631 2 W 4.5 P4 50.800 47.186 80 40 43.572 PF 5/8 - 14 II 22.911 21.749 55 25 20.587 PF 3/4 - 14 II 26.441 25.279 55 25 24.117 LONG Taper Internal Pipe Threads Rc(BSPT)-PT Unit: mm PF 7/8 - 14 II 30.201 29.039 55 25 27.877 PF 1 - 11 II 33.249 31.770 60 30 30.291 Major Diameter Pitch Diameter Minor Diameter PF 1 1/4 - 11 II 41.910 40.431 65 30 38.952 Size HAND PF 1 1/2 - 11 II 47.803 46.324 65 30 44.845Basic SizeBasic SizeBasic Size TAPS PT 1/16 - 28 7.723 7.142 6.561 PF 2 - 11 II 59.614 58.135 75 35 56.656 PF 2 1/2 - 11 II 75.184 73.705 80 40 72.226 PT 1/8 - 28 9.728 9.147 8.566 PF 3 - 11 II 87.884 86.405 85 40 84.926 PT 1/4 - 19 13.157 12.301 11.445 PF 3 1/2 - 11 II 100.330 98.851 85 40 97.372 EG (STI) PTPT 3/8 - 19 16.662 15.806 14.9501/2 - 1420.95519.79318.631PF 4 - 11 II 113.030 111.551 85 40 110.072 PT 5/8 - 14 22.911 21.749 20.587 PT 3/4 - 14 26.441 25.279 24.117 Parallel Internal Pipe Threads Rp(BSPP)-PS Unit: mm SPECIAL PT 7/8 - 14 30.201 29.039 27.877THREADS,PT1 - 1133.24931.77030.291 Majordiameter Pitch Diameter Minordiameter GAUGES PT 1 1/8 - 11 37.897 36.418 34.939PT1 1/4 - 1141.91040.43138.952Size Class BasicSizeBasicSizeUpper LowerTolerance Tolerance(μm) +(μm) +BasicSize THREAD PT 1 1/2 - 11 47.803 46.324 44.845MILLSPT1 3/4 - 1153.74652.26750.788PT2 - 1159.61458.13556.656PS1/16 - 28II7.7237.14230506.561PS1/8 - 28II9.7289.14730508.566PS1/4 - 19II13.15712.301507511.445 PT 2 1/4 65.710 64.231 62.752 PS 3/8 - 19 II 16.662 15.806 50 75 14.950 PT 2 1/2 75.184 73.705 72.226 PS 1/2 - 14 II 20.955 19.793 85 115 18.631 DIES PT 3 - 11 87.884 86.405 84.926 PS 5/8 - 14 II 22.911 21.749 85 115 20.587 PT 3 1/2 100.330 98.851 97.372 PS 3/4 - 14 II 26.441 25.279 85 115 24.117 PT 4 - 11 113.030 111.551 110.072 PS 7/8 - 14 II 30.201 29.039 85 115 27.877 PS 1 - 11 II 33.249 31.770 120 150 30.291 CENTER PS 1 1/4 - 11 II 41.910 40.431 115 150 38.952 DRILLS PS 1 1/2 - 11 II 47.803 46.324 115 150 44.845 PS 2-11 II 59.614 58.135 105 145 56.656 PS 2 1/2 - 11 II 75.184 73.705 140 180 72.226 Technical PS 3 - 11 II 87.884 86.405 135 180 84.926 info PS 4 - 11 II 113.030 111.551 135 180 110.072 680