14. Tap, Thread Limits unit: mm Production data Major Pitch Diameter Minor Major Pitch Diameter Minor Diameter Diameter Diameter Diameter Size Class Upper Lower Size Class Upper Lower Basic Size Basic Size Tolerance Tolerance Basic Size Basic Size Basic Size Tolerance Tolerance Basic Size (μm) (μm) (μm) (μm) + + + + 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 38.1 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 38.1 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 38.1 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 38.1 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 38.1 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 38.1 GH4 50.8 38.1 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 - 4.5 UNC P6 50.800 47.135 120 80 44.689 GH2 25.4 12.7 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 38.1 P3 60 40 1 1/8 - 12 UNF 2B 28.575 27.201 69 29 26.284 GH4 50.8 38.1 Information Technical 1 1/8 - 18 UNEF P3 28.575 27.658 60 40 27.048 Technical-30 801