Internal Metric Thread Table Chart Fastener Sizes M52 - M72

ISO Metric Hardware Engineering Data
 Fastener and Screw / Bolt Design, Formula and Calculations

The following table chart are standard metric internal thread sizes M 52 - M 72 per. ANSI/ASME B1.13M-1995. These thread sizes and classes represent bolts and screws, as well, as other standard internal threads. Do not use these values for standard metric internal thread design. All units in mm.

Metric Internal and External threads

Where:

H = P ( 31/2 / 2 ) = 0.866025 P
or
0.125H = 0.108253P

ISO Metric
Thread Designation
Pitch
Metric Internal Threads
Specification Table
Tolerance Class
Minor Dia
Pitch Dia
Major Dia
Tap Drill
Min
Max
Min
Max
Min
Max
Basic
M52x5
5
6H
46.587
47.297
48.752
49.067
52.000
53.037
47.000
M52x4
4
6H
47.670
48.270
49.402
49.717
52.000
52.892
48.000
M52x3
3
6H
48.752
49.252
50.051
50.331
52.000
52.713
49.000
M52x2
2
6H
49.835
50.210
50.701
50.937
52.000
52.525
50.000
M52x1.5
1.5
6H
50.376
50.676
51.026
51.238
52.000
52.429
50.500
M55x4
4
6H
50.670
51.270
52.402
52.717
55.000
55.892
51.000
M55x3
3
6H
51.752
52.252
53.051
53.331
55.000
55.713
52.000
M55x2
2
6H
52.835
53.210
53.701
53.937
55.000
55.525
53.000
M55x1.5
1.5
6H
53.376
53.676
54.026
54.238
55.000
55.428
53.500
M56x6.5
6.5
6H
48.964
49.814
51.778
52.178
56.000
57.338
49.500
M56x5.5
5.5
6H
50.046
50.796
52.428
52.783
56.000
57.149
50.500
M56x4
4
6H
51.670
52.270
53.402
53.717
56.000
56.892
52.000
M56x3
3
6H
52.752
53.252
54.051
54.331
56.000
56.713
53.000
M56x2
2
6H
53.835
54.210
54.701
54.937
56.000
56.525
54.000
M56x1.5
1.5
6H
54.376
54.676
55.026
55.238
56.000
56.429
54.500
M56x1
1
6H
54.917
55.153
55.350
55.540
56.000
56.334
55.000
M58x4
4
6H
53.670
54.270
55.402
55.717
58.000
58.892
54.000
M58x3
3
6H
54.752
55.252
56.051
56.331
58.000
58.713
55.000
M58x2
2
6H
55.835
56.210
56.701
56.937
58.000
58.525
56.000
M58x1.5
1.5
6H
56.376
56.676
57.026
57.238
58.000
58.429
56.500
M60x5.5
5.5
6H
54.046
54.796
56.428
56.783
60.000
61.149
54.500
M60x4
4
6H
55.670
56.270
57.402
57.717
60.000
60.892
54.000
M60x3
3
6H
56.752
57.252
58.051
58.331
60.000
60.713
57.000
M60x2
2
6H
57.835
58.210
58.701
58.937
60.000
60.525
58.000
M60x1.5
1.5
6H
58.376
58.676
59.026
59.238
60.000
60.428
58.500
M60x1
1
6H
58.917
59.153
59.350
59.540
60.000
60.334
59.000
M62x4
4
6H
57.670
58.270
59.402
59.717
62.000
62.892
58.000
M62x3
3
6H
58.752
59.252
60.051
60.331
62.000
62.713
59.000
M62x2
2
6H
59.835
60.210
60.701
60.937
62.000
62.525
60.000
M62x1.5
1.5
6H
60.376
60.676
61.026
61.238
62.000
62.429
60.500
M63x1.5
1.5
6H
61.376
61.676
62.026
62.238
63.000
63.429
61.500
M64x6
6
6H
57.505
58.305
60.103
60.478
64.000
65.241
58.000
M64x5.5
5.5
6H
58.046
58.796
60.428
60.783
64.000
65.149
58.500
M64x4
4
6H
59.670
60.270
61.402
61.717
64.000
64.892
60.000
M64x3
3
6H
60.752
61.252
62.051
62.331
64.000
64.713
61.000
M64x2
2
6H
61.835
62.210
62.701
62.937
64.000
64.525
62.000
M64x1.5
1.5
6H
62.376
62.676
63.026
63.238
64.000
64.429
62.500
M64x1
1
6H
62.917
63.153
63.350
63.540
64.000
64.334
63.000
M65x4
4
6H
60.670
61.270
62.402
62.717
65.000
65.892
61.000
M65x3
3
6H
61.752
62.252
63.051
63.331
65.000
65.713
62.000
M65x2
2
6H
62.835
63.210
63.701
63.937
65.000
65.525
63.000
M65x1.5
1.5
6H
63.376
63.676
64.026
64.238
65.000
65.428
63.500
M68x6
6
6H
61.505
62.305
64.103
64.478
68.000
69.241
62.000
M68x4
4
6H
63.670
64.270
65.402
65.717
68.000
68.892
64.000
M68x3
3
6H
64.752
65.252
66.051
66.331
68.000
68.713
65.000
M68x2
2
6H
65.835
66.210
66.701
66.937
68.000
68.525
66.000
M68x1.5
1.5
6H
66.376
66.676
67.026
67.238
68.000
68.429
66.500
M68x1
1
6H
66.917
67.153
67.350
67.540
68.000
68.334
67.000
M70x6
6
6H
63.505
64.305
66.103
66.478
70.000
71.241
64.000
M70x4
4
6H
65.670
66.270
67.402
67.717
70.000
70.892
66.000
M70x3
3
6H
66.752
67.252
68.051
68.331
70.000
70.713
67.000
M70x2
2
6H
67.835
68.210
68.701
68.937
70.000
70.525
68.000
M70x1.5
1.5
6H
68.376
68.676
69.026
69.238
70.000
70.428
68.500
M72x6
6
6H
65.505
66.305
68.103
68.478
72.000
73.241
66.000
M72x4
4
6H
67.670
68.270
69.402
69.717
72.000
72.892
68.000
M72x3
3
6H
68.752
69.252
70.051
70.331
72.000
72.713
69.000
M72x2
2
6H
69.835
70.210
70.701
70.937
72.000
72.525
70.000
M72x1.5
1.5
6H
70.376
70.676
71.026
71.238
72.000
72.429
70.500
M72x1
1
6H
70.917
71.153
71.350
71.540
72.000
72.334
71.000

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