Page 58 - HOLE MAKING CATALOG p311-382

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 H1 = 5 H = 0.54127P
H 8
H1 17
1/2·H 1/4·H r 60° h3 h3 = 24 H = 0.61343P

60° d2 = D2 = d- 3 H = d-0.64952P
Screw1/6·H 4

d3 = d-2h3 = d-1.22687P

D D2 D1 P d3 d2 d r = H = 0.14434P
6

Nominal Flank Dia. Minor Diameter Thread Depth Flank Dia. Tap Flank Dia. Tap
Dia. d=D d2=D2 Tolerance 6H d2 Tolerance 6H
Pitch P Radius r
M 20 19.35 Screw Nut D1 Screw Nut H1 Min. Max. Min. Max.
M 20 1 19.026 d3 h3 0.144
M 20 1.5 18.701 18.917 0.541 0.217 19.388 19.413 19.35 19.51
M 22 2 21.35 18.773 18.376 0.613 0.812 0.289 19.071 19.101 19.026 19.216
M 22 1 21.026 18.16 17.835 0.92 1.083 0.144 18.752 18.786 18.701 18.913
M 22 1.5 20.701 17.546 20.917 1.227 0.541 0.217 21.388 21.413 21.35 21.51
M 24 2 23.350 20.773 20.376 0.613 0.812 0.289 21.071 21.101 21.026 21.216
M 24 1 23.026 20.16 19.835 0.92 1.083 0.144 20.752 20.786 20.701 20.913
M 24 1.5 22.701 19.546 22.917 1.227 0.541 0.217 23.390 23.416 23.350 23.520
M 25 2 24.350 22.773 22.376 0.613 0.812 0.289 23.074 23.106 23.026 23.226
M 25 1 24.026 22.160 21.835 0.920 1.083 0.144 22.754 22.791 22.701 22.925
M 25 1.5 23.701 21.546 23.917 1.227 0.541 0.217 24.390 24.416 24.350 24.520
M 26 2 25.350 23.773 23.376 0.613 0.812 0.289 24.074 24.106 24.026 24.226
M 26 1 25.026 23.160 22.835 0.920 1.083 0.144 23.754 23.791 23.701 23.925
M 26 1.5 24.701 22.546 24.917 1.227 0.541 0.217 25.390 25.416 25.350 25.520
M 27 2 26.350 24.773 24.376 0.613 0.812 0.289 25.074 25.106 25.026 25.226
M 27 1 26.026 24.160 23.835 0.920 1.083 0.144 24.754 24.791 24.701 24.925
M 27 1.5 25.701 23.546 25.917 1.227 0.541 0.217 26.390 26.416 26.350 26.520
M 28 2 27.350 25.773 25.376 0.613 0.812 0.289 26.074 26.106 26.026 26.226
M 28 1 27.026 25.160 24.835 0.920 1.083 0.144 25.754 25.791 25.701 25.925
M 28 1.5 26.701 24.546 26.917 1.227 0.541 0.217 27.390 27.416 27.350 27.520
M 30 2 29.350 26.773 26.376 0.613 0.812 0.289 27.074 27.106 27.026 27.226
M 30 1 29.026 26.160 25.835 0.920 1.083 0.144 26.754 26.791 26.701 26.925
M 30 1.5 28.701 25.546 28.917 1.227 0.541 0.217 29.390 29.416 29.350 29.520
M 30 2 28.051 28.773 28.376 0.613 0.812 0.289 29.074 29.106 29.026 29.226
M 32 3 31.026 28.160 27.835 0.920 1.083 0.433 28.754 28.791 28.701 28.925
M 32 1.5 30.701 27.546 26.752 1.227 1.624 0.217 28.115 28.157 28.051 28.316
M 33 2 32.026 26.319 30.376 1.840 0.812 0.289 31.074 31.106 31.026 31.226
M 33 1.5 31.701 30.160 29.835 0.920 1.083 0.217 30.754 30.791 30.701 30.925
M 33 2 31.051 29.546 31.376 1.227 0.812 0.289 32.074 32.106 32.026 32.226
M 35 3 34.026 31.160 30.835 0.920 1.083 0.433 31.754 31.791 31.701 31.925
M 35 1.5 33.701 30.546 29.752 1.227 1.624 0.217 31.115 31.157 31.051 31.316
M 36 2 35.026 29.319 33.376 1.840 0.812 0.289 34.074 34.106 34.026 34.226
M 36 1.5 34.701 33.160 32.835 0.920 1.083 0.217 33.754 33.791 33.701 33.925
M 36 2 34.051 32.546 34.376 1.227 0.812 0.289 35.074 35.106 35.026 35.226
M 38 3 37.026 34.160 33.835 0.920 1.083 0.433 34.754 34.791 34.701 34.925
M 39 1.5 38.026 33.546 32.752 1.227 1.624 0.217 34.115 34.157 34.051 34.316
M 39 1.5 37.701 32.319 36.376 1.840 0.812 0.217 37.074 37.106 37.026 37.226
M 39 2 37.051 36.160 37.376 0.920 0.812 0.289 38.074 38.106 38.026 38.226
M 40 3 39.026 37.160 36.835 0.920 1.083 0.433 37.754 37.791 37.701 37.925
1.5 36.546 35.752 1.227 1.624 0.217 37.115 37.157 37.051 37.316
35.319 38.376 1.840 0.812 39.074 39.106 39.026 39.226
38.160 0.920

368 ISCAR