Description of productsTechnical Information 14. Tap, Thread Limits ■ for Parallel Pipe Threads (PF·G) Unit:mm ■ for Taper Pipe Threads (PT·Rc) Unit:mm MajorDiameter Pitch Diameter MinorDiameter Size MajorDiameterPitch Diameter Minor Diameter Size Class Basic Upper LowerBasicTolerance ToleranceBasic Basic Size Basic Size Basic Size Size Size ( μ m) ( μ m) Size++ PT 1/16 - 28 7.723 7.142 6.561 PF 1/16 - 28 Ⅱ 7.723 7.142 40 20 6.561 PT 1/8 - 28 9.728 9.147 8.566 PF 1/8 - 28 Ⅱ 9.728 9.147 40 20 8.566 PT 1/4 - 19 13.157 12.301 11.445 PF 1/4 - 19 Ⅱ 13.157 12.301 50 25 11.445 PT 3/8 - 19 16.662 15.806 14.950 PF 3/8 - 19 Ⅱ 16.662 15.806 50 25 14.950 PT 1/2 - 14 20.955 19.793 18.631 PF 1/2 - 14 Ⅱ 20.955 19.793 55 25 18.631 PT 5/8 - 14 22.911 21.749 20.587 PF 5/8 - 14 Ⅱ 22.911 21.749 55 25 20.587 PT 3/4 - 14 26.441 25.279 24.117 PF 3/4 - 14 Ⅱ 26.441 25.279 55 25 24.117 PT 7/8 - 14 30.201 29.039 27.877 PF 7/8 - 14 Ⅱ 30.201 29.039 55 25 27.877 PT 1 - 11 33.249 31.770 30.291 PF 1 - 11 Ⅱ 33.249 31.770 60 30 30.291 PT 1 1/8 - 11 37.897 36.418 34.939 PF 1 1/4 - 11 Ⅱ 41.910 40.431 65 30 38.952 PT 1 1/4 - 11 41.910 40.431 38.952 PF 1 1/2 - 11 Ⅱ 47.803 46.324 65 30 44.845 PT 1 1/2 - 11 47.803 46.324 44.845 PF 2 - 11 Ⅱ 59.614 58.135 75 35 56.656 PT 1 3/4 - 11 53.746 52.267 50.788 PF 2 1/2 - 11 Ⅱ 75.184 73.705 80 40 72.226 PT 2 - 11 59.614 58.135 56.656 PF 3 - 11 Ⅱ 87.884 86.405 85 40 84.926 PT 2 1/4 - 11 65.710 64.231 62.752 PF 3 1/2 - 11 Ⅱ 100.330 98.851 85 40 97.372 PT 2 1/2 - 11 75.184 73.705 72.226 PF 4 - 11 Ⅱ 113.030 111.551 85 40 110.072 PT 3 - 11 87.884 86.405 84.926 PT 3 1/2 - 11 100.330 98.851 97.372 PT 4 - 11 113.030 111.551 110.072 ■ for Parallel Pipe Threads (PS·Rp) Unit:mm ■ for Miniature Screw Threads Unit:mm MajorDiameter Pitch Diameter MinorDiameter MajorDiameter Pitch Diameter MinorDiameter Size Class Basic Upper LowerBasicTolerance ToleranceBasic Size Class Basic Upper LowerBasicTolerance ToleranceBasic Size Size ( μ m) ( μ m) Size Size Size ( μ m) ( μ m) Size - - + + PS 1/16 - 28 Ⅱ 7.723 7.142 30 50 6.561 S 0.5 × 0.125 - 0.500 0.419 15 7 0.380 PS 1/8 - 28 Ⅱ 9.728 9.147 30 50 8.566 - 15 7 S 0.6 × 0.15 0.600 0.503 0.456 PS 1/4 - 19 Ⅱ 13.157 12.301 50 75 11.445 GS2 23 13 PS 3/8 - 19 Ⅱ 16.662 15.806 50 75 14.950 - 20 10 S 0.7 × 0.175 0.700 0.586 0.532 PS 1/2 - 14 Ⅱ 20.955 19.793 85 115 18.631 GS3 28 18 PS 5/8 - 14 Ⅱ 22.911 21.749 85 115 20.587 - 20 10 S 0.8 × 0.2 0.800 0.670 0.608 PS 3/4 - 14 Ⅱ 26.441 25.279 85 115 24.117 GS3 28 18 PS 7/8 - 14 Ⅱ 30.201 29.039 85 115 27.877 - 20 10 S 0.9 × 0.225 0.900 0.754 0.684 PS 1 - 11 Ⅱ 33.249 31.770 120 150 30.291 GS4 33 23 PS 1 1/4 - 11 Ⅱ 41.910 40.431 115 150 38.952 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 PS 3 - 11 Ⅱ 87.884 86.405 135 180 84.926 PS 4 - 11 Ⅱ 113.030 111.551 135 180 110.072 Technical-32