Page 727 - Iscar

USER GUIDE

ISO Metric Fine Thread TAPS
Nominal Dimensions According to UNI 4535-64

Tap flank diameter production tolerances for ISO 6H
Nut threads limit dimensions - nut threads ISO 6H

Coarse Pitch Threads
1/8·H
Nut thread Dimensions in mm
1/2·H H1 h3 H = 0.86603P
H 60° H1 = 5 H = 0.54127P
8
60°
1/2·H 17
Screw h3 = H = 0.61343P
1/4·H 1/6·H 24
r
3
d2 = D2 = d- H = d-0.64952P
DD2 D1 P d3 d2 d 4
d3 = d-2h3 = d-1.22687P
r = H = 0.14434P
6

Flank Dia. Tap
Nominal Pitch Flank Minor Diameter Thread Depth Radius Tolerance 6H d2 Flank Dia. Tap
Tolerance 6H
Dia. Dia. Screw Nut Screw Nut
d=D P d2=D2 r Min. Max. Min. Max.
d3 D1 h3 H1
M 2 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
M 3 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
M 4 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
M 5 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
M 6 0.5 5.675 5.387 5.459 0.307 0.271 0.072 5.702 5.72 5.675 5.787
M 6 0.75 5.513 5.08 5.188 0.46 0.406 0.108 5.545 5.566 5.513 5.645
M 7 0.75 6.513 6.08 6.188 0.46 0.406 0.108 6.545 6.566 6.513 6.645
M 8 0.5 7.675 7.387 7.459 0.307 0.271 0.072 7.702 7.72 7.675 7.787
M 8 0.75 7.513 7.08 7.188 0.46 0.406 0.108 7.545 7.566 7.513 7.645
M 8 1 7.35 6.773 6.917 0.613 0.541 0.144 7.835 7.409 7.35 7.5
M 9 0.75 8.513 8.08 8.188 0.46 0.406 0.108 8.545 8.566 8.513 8.645
M 9 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

723
723