Trapezoidal Metric Thread Machinery's Handbook, 31st Edition
2043
Trapezoidal Metric Thread—Preferred Basic Sizes DIN 103
a P Nut
H
has
H = 1.866 P h s = 0.5 P + a
H /2
30°
hn
r *
he
h e = 0.5 P + a − b h n = 0.5 P + 2 a − b h as = 0.25 P
hs
Dn
Ds
E
b
Kn
Ks
Bolt
Bolt
Nut
Nom. & Major Diam.of Bolt, D s
Depth of Engage ment, h e
Clearance
Minor Diam., K s
Pitch Diam., E
Depth of Thread, h s
Major Diam., D n
Minor Diam., K n
Depth of Thread, h n
Pitch, P
a
b
10 12 14 16 18 20 22 24 26 28 30 32 36 40 44 48 50 52 55 60 65 70 75 80 85 90 95
3 3 4 4 4 4 5 5 5 5 6 6 6 7 7 8 8 8 9 9
8.5 10.5 12 14 19.5 21.5 23.5 25.5 16 18
1.25 0.25 0.5 1.25 0.25 0.5 1.75 0.25 0.5
6.5 8.5 9.5
1.75 10.5 1.75 12.5 2.25 14.5 2.25 16.5 2.25 18.5 2.25 20.5 2.75 22.5 2.75 24.5 2.75 26.5 2.75 28.5 3.25 30.5 3.25 32.5 3.25 36.5 3.75 40.5 3.75 44.5 4.25 48.5 4.25 50.5 4.25 52.5 4.75 55.5 4.75 60.5 5.25 65.5 5.25 70.5 5.25 75.5 5.25 80.5 6.25 85.5 6.25 90.5 6.25 95.5 6.25 100.5 6.25 110.5 7.5 121 7.5 131 7.5 141
7.5 9.5 10.5 12.5 14.5 16.5 18 20
1.50 1.50 2.00 2.00 2.00 2.00 2.00 2.25 2.25 2.25 2.75 2.75 2.75 3.25 3.25 3.75 3.75 3.75 4.25 4.25 4.75 4.75 4.75 4.75 5.75 5.75 5.75 5.75 5.75 6.5 6.5 6.5
1.75 0.25 0.5 11.5 1.75 0.25 0.5 13.5 1.75 0.25 0.5 15.5
2 2 2 2
0.25 0.75 16.5 0.25 0.75 18.5 0.25 0.75 20.5 0.25 0.75 22.5 0.25 0.75 23.5 0.25 0.75 25.5 0.25 0.75 29.5 0.25 0.75 32.5 0.25 0.75 36.5 0.25 0.75 39.5 0.25 0.75 41.5 0.25 0.75 43.5 0.25 0.75 45.5 0.25 0.75 50.5 0.25 0.75 54.5 0.25 0.75 59.5 0.25 0.75 64.5 0.25 0.75 69.5 0.25 0.75 72.5 0.25 0.75 77.5 0.25 0.75 82.5 0.25 0.75 87.5 0.25 0.75 97.5
22 24 25 27 31 34 38 41 43 45 47 52 56 61 66 71 74 79 84 89
27 29 33
2.5 2.5 2.5 3.5 3.5 3.5 3 3 4.5 4.5 4.5 4.5 5.5 5.5 5.5 5.5 4 4 5.5
36.5 40.5 44 46 48 50.5 55.5 60
10 10 10 10 12 12 12 12
65 70 75 79 84 89 94
100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300
12 104 14 113 14 123 14 133 16 142 16 152 16 162 18 171 18 181 18 191 20 200 20 210 20 220 22 229 22 239 22 249 24 258 24 268 24 278 26 287
99 108 118 128 136 146 156 164 174 184 192 202 212 220 230 240 248 258 268 276
6 6 6 7 7 7 8 8 8 9 9 9
0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
1.5 105 1.5 115 1.5 125 1.5 133 1.5 143 1.5 153 1.5 161 1.5 171 1.5 181 1.5 189 1.5 199 1.5 209 1.5 217 1.5 227 1.5 237 1.5 245 1.5 255 1.5 265 1.5 273
8.5 151 8.5 161 8.5 171 9.5 181 9.5 191 9.5 201 10.5 211 10.5 221 10.5 231 11.5 241 11.5 251 11.5 261 12.5 271 12.5 281 12.5 291 13.5 301
7.5 7.5 7.5 8.5 8.5 8.5 9.5 9.5
9.5 10.5 10.5 10.5 11.5 11.5 11.5 12.5
10 10 10 11 11 11 12
All dimensions are in millimeters. *Roots are rounded to a radius, r , equal to 0.25 mm for pitches of from 3 to 12 mm inclusive and 0.5 mm for pitches of from 14 to 26 mm inclusive for power transmission.
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