TAPS USER GUIDE ISO Metric Fine Thread Nominal Dimensions According to UNI 4535-64 Tap flank diameter production tolerances for ISO 6H Nut Coarse Pitch Threads Dimensions in mm threads limit dimensions - nut threads ISO 6H Nut thread 1/8·H H = 0.86603P 1/2·H H1H H1 = 58 H = 0.54127P60°h3h3 = 17 24 H = 0.61343P 1/2·H 1/4·H r 60°Screw1/6·H d2 = D2 = d- 34 H = d-0.64952Pd3 = d-2h3 = d-1.22687P D D2 D1 P d3 d2 d r = H6 = 0.14434P NominalDia. d=DPitch PFlank Dia.d2=D2Minor DiameterScrewd3Nut D1Thread DepthScrewh3Radius rNut H1Flank Dia. TapTolerance 6H d2Min.Max.Flank Dia. TapTolerance 6HMin.Max. M2 0.25 1.838 1.693 1.729 0.153 0.135 0.036 1.844 1.856 1.838 1.886 M 2.5 0.35 2.273 2.701 2.121 0.215 0.189 0.051 2.293 2.307 2.273 2.358 M3 0.35 2.773 2.571 2.621 0.215 0.189 0.051 2.794 2.809 2.773 2.863 M 3.5 0.35 3.273 3.071 3.121 0.215 0.189 0.051 3.294 3.309 3.273 3.363 M4 0.5 3.675 3.387 3.459 0.307 0.271 0.072 3.699 3.715 3.675 3.775 M 4.5 0.5 4.175 3.887 3.959 0.307 0.271 0.072 4.199 4.215 4.175 4.275 M5 0.5 4.675 4.387 4.459 0.307 0.271 0.072 4.699 4.715 4.675 4.775 M 5.5 0.5 5.175 4.887 4.959 0.307 0.271 0.072 5.199 5.215 5.175 5.275 M6 0.5 5.675 5.387 5.459 0.307 0.271 0.072 5.702 5.72 5.675 5.787 M6 0.75 5.513 5.08 5.188 0.46 0.406 0.108 5.545 5.566 5.513 5.645 M7 0.75 6.513 6.08 6.188 0.46 0.406 0.108 6.545 6.566 6.513 6.645 M8 0.5 7.675 7.387 7.459 0.307 0.271 0.072 7.702 7.72 7.675 7.787 M8 0.75 7.513 7.08 7.188 0.46 0.406 0.108 7.545 7.566 7.513 7.645 M8 1 7.35 6.773 6.917 0.613 0.541 0.144 7.835 7.409 7.35 7.5 M9 0.75 8.513 8.08 8.188 0.46 0.406 0.108 8.545 8.566 8.513 8.645 M9 1 8.35 7.773 7.917 0.613 0.541 0.144 8.385 8.409 8.35 8.5 M 10 0.5 9.675 9.387 9.459 0.307 0.271 0.072 9.702 9.72 9.675 9.787 M 10 0.75 9.513 9.08 9.188 0.46 0.406 0.108 9.545 9.566 9.513 9.645 M 10 1 9.35 8.773 8.917 0.613 0.541 0.144 9.385 9.409 9.35 9.5 M 10 1.25 9.188 8.466 8.647 0.767 0.677 0.18 9.226 9.251 9.188 9.348 M 11 0.75 10.513 10.08 10.188 0.46 0.406 0.108 10.545 10.566 10.513 10.645 M 11 1 10.35 9.773 9.917 0.613 0.541 0.144 10.385 10.409 10.35 10.5 M 12 0.75 11.513 11.08 11.188 0.46 0.406 0.108 11.547 11.569 11.513 11.653 M 12 1 11.35 10.773 10.917 0.613 0.541 0.144 11.388 11.413 11.35 11.51 M 12 1.25 11.188 10.466 10.647 0.767 0.677 0.18 11.23 11.258 11.188 11.368 M 12 1.5 11.026 10.16 10.376 0.92 0.812 0.217 11.071 11.101 11.026 11.216 M 13 1 12.35 11.773 11.917 0.613 0.541 0.144 12.388 12.413 12.35 12.51 M 14 1 13.35 12.773 12.917 0.613 0.541 0.144 13.388 13.413 13.35 13.51 M 14 1.25 13.188 12.466 12.647 0.767 0.677 0.18 13.23 13.258 13.188 13.368 M 14 1.5 13.026 12.16 12.376 0.92 0.812 0.217 13.071 13.101 13.026 13.216 M 15 1 14.35 13.773 13.917 0.613 0.541 0.144 14.388 14.413 14.35 14.51 M 15 1.5 14.026 13.16 13.376 0.92 0.812 0.217 14.071 14.101 14.026 14.216 M 16 1 15.35 14.773 14.917 0.613 0.541 0.144 15.388 15.413 15.35 15.51 M 16 1.25 15.188 14.466 14.647 0.767 0.677 0.18 15.23 15.258 15.188 15.368 M 16 1.5 15.026 14.16 14.376 0.92 0.812 0.217 15.071 15.101 15.026 15.216 M 17 1 16.35 15.773 15.917 0.613 0.541 0.144 16.388 16.413 16.35 16.51 M 17 1.5 16.026 15.16 15.376 0.92 0.812 0.217 16.071 16.101 16.026 16.216 M 18 1 17.350 16.773 16.917 0.613 0.541 0.144 17.388 17.413 17.35 17.51 M 18 1.5 17.026 16.16 16.376 0.92 0.812 0.217 17.071 17.101 17.026 17.216 M 18 2 16.701 15.546 15.835 1.227 1.083 0.289 16.752 16.786 16.701 16.913 367