Description of productsTechnical Information 14. Tap, Thread Limits Unit:mm MajorDiameterPitch Diameter MinorDiameter MajorDiameterPitch Diameter MinorDiameter Size Class Basic Upper LowerBasicTolerance ToleranceBasicSize Class Basic Upper LowerBasicToleranceToleranceBasic Size Size ( μ m) ( μ m) Size Size Size ( μ m) ( μ m) Size + + + + P4 80 60 P5 100 60 5/8 - 11 UNC 2B 15.875 14.376 63 30 13.376 1 1/4 -7 UNC 2B 31.750 29.393 79 38 27.823 GH1 12.7 0 GH4 50.8 25.4 P3 60 40 1 1/4 -8 UN P5 31.750 29.688 100 60 28.313 5/8 - 18 UNF 2B 15.875 14.958 56 23 14.348 P4 80 60 GH1 12.7 0 1 1/4 - 12 UNF 2B 31.750 30.376 70 29 29.459 5/8 - 24 UNEF P3 15.875 15.187 60 40 14.729 GH4 50.8 25.4 11/16 - 11 UNS GH3 17.462 15.964 38.1 25.4 14.963 P5 100 60 1 3/8 -6 UNC 34.925 32.174 30.343 11/16 - 16 UNS GH3 17.462 16.431 38.1 25.4 15.743 GH4 50.8 25.4 P4 80 60 1 3/8 -8 UN P5 34.925 32.863 100 60 31.488 3/4 - 10 UNC 2B 19.050 17.399 66 31 16.299 P4 80 40 GH2 25.4 12.7 1 3/8 - 12 UNF 2B 34.925 33.551 71 29 32.634 P3 60 40 GH4 50.8 25.4 3/4 - 16 UNF 2B 19.050 18.019 60 25 17.330 P5 100 60 1 1/2 - 6 UNC 38.100 35.349 33.518 GH1 12.7 0 GH4 50.8 25.4 3/4 - 20 UNEF P3 19.050 18.224 60 40 17.676 P4 80 40 P4 80 60 1 1/2 - 12 UNF 2B 38.100 36.726 73 29 35.809 7/8 -9 UNC 2B 22.225 20.391 70 33 19.169 GH4 50.8 25.4 GH2 25.4 12.7 1 3/4 -5 UNC P6 44.450 41.151 120 80 38.951 P3 60 40 1 3/4 - 12 UN P4 44.450 43.076 80 40 42.159 7/8 - 14 UNF 2B 22.225 21.046 64 27 20.262 2 - 4 1/2UNC P6 50.800 47.135 120 80 44.689 GH1 12.7 0 2 - 12 UN P4 50.800 49.426 80 40 48.509 7/8 - 20 UNEF P3 22.225 21.400 60 40 20.851 P4 80 40 1 -8 UNC 2B 25.400 23.338 73 35 21.963 GH2 25.4 12.7 P4 80 60 1 - 12 UNF 2B 25.400 24.026 67 29 23.109 GH4 50.8 38.1 P4 80 60 1 - 14 UNS 2B 25.400 24.221 65 38 23.437 GH2 25.4 12.7 1 - 20 UNEF P3 25.400 24.574 60 40 24.026 P5 100 60 1 1/8 -7 UNC 28.575 26.218 24.648 GH4 50.8 25.4 P3 60 40 1 1/8 - 12 UNF 2B 28.575 27.201 69 29 26.284 GH4 50.8 25.4 1 1/8 - 18 UNEF P3 28.575 27.658 60 40 27.048 Technical-30