Page 726 - Iscar

USER GUIDE
TAPS ISO Metric Thread

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
M1.6 0.35 1.373 1.171 1.221 0.215 0.189 0.051 1.393 1.407 1.373 1.458
M1.8 0.35 1.573 1.371 1.421 0.215 0.189 0.051 1.593 1.607 1.573 1.658
M2 0.4 1.740 1.509 1.567 0.245 0.217 0.058 1.761 1.776 1.740 1.830
M2.2 0.45 1.908 1.648 1.713 0.276 0.244 0.065 1.931 1.946 1.908 2.003
M2.5 0.45 2.208 1.948 2.013 0.276 0.244 0.065 2.231 2.246 2.208 2.303
M3 0.5 2.675 2.387 2.459 0.307 0.271 0.072 2.699 2.715 2.675 2.775
M3.5 0.6 3.110 2.764 2.850 0.368 0.325 0.087 3.137 3.155 3.110 3.222
M4 0.7 3.545 3.141 3.242 0.429 0.379 0.101 3.574 3.593 3.545 3.663
M4.5 0.75 4.013 3.580 3.688 0.460 0.406 0.108 4.042 4.061 4.013 4.131
M5 0.8 4.480 4.019 4.134 0.491 0.433 0.115 4.510 4.530 4.480 4.605
M6 1 5.350 4.773 4.917 0.613 0.541 0.144 5.385 5.409 5.350 5.500
M7 1 6.350 5.773 5.917 0.613 0.541 0.144 6.385 6.409 6.350 6.500
M8 1.25 7.188 6.466 6.647 0.767 0.677 0.180 7.226 7.251 7.188 7.348
M9 1.25 8.188 7.466 7.647 0.767 0.677 0.180 8.226 8.251 8.188 8.348
M10 1.5 9.026 8.160 8.376 0.920 0.812 0.217 9.068 9.096 9.026 9.206
M11 1.5 10.026 9.160 9.376 0.920 0.812 0.217 10.068 10.096 10.026 10.206
M12 1.75 10.863 9.853 10.106 1.074 0.947 0.253 10.911 10.943 10.863 11.063
M14 2 12.701 11.546 11.835 1.227 1.083 0.289 12.752 12.786 12.701 12.913
M16 2 14.701 13.546 13.835 1.227 1.083 0.289 14.752 14.786 14.701 14.913
M18 2.5 16.376 14.933 15.294 1.534 1.353 0.361 16.430 16.466 16.376 16.600
M20 2.5 18.376 16.933 17.294 1.534 1.353 0.361 18.430 18.466 18.376 18.600
M22 2.5 20.376 18.933 19.294 1.534 1.353 0.361 20.430 20.466 20.376 20.600
M24 3 22.051 20.319 20.752 1.840 1.624 0.433 22.115 22.157 22.051 22.316
M27 3 25.051 23.319 23.752 1.840 1.624 0.433 25.115 25.157 25.051 25.316
M30 3.5 27.727 25.706 26.211 2.147 1.894 0.505 27.794 27.839 27.727 28.007
M33 3.5 30.727 28.706 29.211 2.147 1.894 0.505 30.794 30.839 30.727 31.007
M36 4 33.402 31.093 31.670 2.454 2.165 0.577 33.473 33.520 33.402 33.702
M39 4 36.402 34.093 34.670 2.454 2.165 0.577 36.473 36.520 36.402 36.702
M42 4.5 39.077 36.479 37.129 2.760 2.436 0.650 39.152 39.202 39.077 39.392
M45 4.5 42.077 39.479 40.129 2.760 2.436 0.650 42.152 42.202 42.077 42.392
M48 5 44.752 41.866 42.587 3.067 2.706 0.722 44.832 44.885 44.752 45.087
M52 5 48.752 45.866 46.587 3.067 2.706 0.722 48.832 48.885 48.752 49.087
M56 5.5 52.428 49.252 50.046 3.374 2.977 0.794 52.512 52.568 52.428 52.783
M60 5.5 56.428 53.252 54.046 3.374 2.977 0.794 56.512 56.568 56.428 56.783
M64 6 60.103 56.639 57.505 3.681 3.248 0.866 60.193 60.253 60.103 60.478
M68 6 64.103 60.639 61.505 3.681 3.248 0.866 64.193 64.253 64.103 64.478
Metric Thread MA old UNI 159 profile ) Nut Tolerance SH8

(

M1.7 0.35 1.473 1.246 1.246 0.227 0.227 0.040 1.493 1,507 1.473 1.529
M2.3 0.4 2.040 1.780 1.780 0.260 0.260 0.040 2.061 2.076 2.040 2.120
M2.6 0.45 2.308 2.016 2.016 0.292 0.292 0.050 2.331 2.346 2.308 2.388

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