ISO Hardware Engineering Data
Hardware Supplier and Manufacturers
Fastener and Screw / Bolt Design, Formula and Calculations
ISO Metric
Thread Designation |
Pitch |
External Threads |
Tolerance Class |
Major Dia |
Pitch Dia |
Minor Dia |
Max |
Min |
Max |
Min |
Max |
Min |
M20x2.5
|
2.5
|
6g
|
19.958
|
19.623
|
18.334
|
18.164
|
17.252
|
16.624
|
M20x2.5
|
2.5
|
4g6g
|
19.958
|
19.623
|
18.334
|
18.228
|
17.252
|
16.688
|
M20x2
|
2
|
6g
|
19.962
|
19.682
|
18.663
|
18.503
|
17.797
|
17.271
|
M20x2
|
2
|
4g6g
|
19.962
|
19.682
|
18.663
|
18.562
|
17.797
|
17.330
|
M20x1.5
|
1.5
|
6g
|
19.968
|
19.732
|
18.994
|
18.854
|
18.344
|
17.930
|
M20x1.5
|
1.5
|
4g6g
|
19.968
|
19.732
|
18.994
|
18.904
|
18.344
|
17.980
|
M20x1
|
1
|
6g
|
19.974
|
19.794
|
19.324
|
19.206
|
18.891
|
18.590
|
M20x1
|
1
|
4g6g
|
19.974
|
19.794
|
19.324
|
19.249
|
18.891
|
18.633
|
M20x0.75
|
0.75
|
6g
|
19.978
|
19.838
|
19.491
|
19.385
|
19.166
|
18.923
|
M20x0.75
|
0.75
|
4g6g
|
19.978
|
19.838
|
19.491
|
19.424
|
19.166
|
18.962
|
M20x0.5
|
0.5
|
6g
|
19.980
|
19.874
|
19.655
|
19.565
|
19.439
|
19.257
|
M20x0.5
|
0.5
|
4g6g
|
19.980
|
19.874
|
19.655
|
19.599
|
19.439
|
19.291
|
M22x3
|
3
|
6g
|
21.952
|
21.577
|
20.003
|
19.818
|
18.704
|
17.970
|
M22x3
|
3
|
4g6g
|
21.952
|
21.577
|
20.003
|
19.885
|
18.704
|
18.037
|
M22x2.5
|
2.5
|
6g
|
21.958
|
21.623
|
20.334
|
20.164
|
19.252
|
18.624
|
M22x2.5
|
2.5
|
4g6g
|
21.958
|
21.623
|
20.334
|
20.234
|
19.252
|
18.694
|
M22x2
|
2
|
6g
|
21.962
|
21.682
|
20.663
|
20.503
|
19.797
|
19.271
|
M22x2
|
2
|
4g6g
|
21.962
|
21.682
|
20.663
|
20.563
|
19.797
|
19.331
|
M22x1.5
|
1.5
|
6g
|
21.968
|
21.732
|
20.994
|
20.854
|
20.344
|
19.930
|
M22x1.5
|
1.5
|
4g6g
|
21.968
|
21.732
|
20.994
|
20.904
|
20.344
|
19.980
|
M22x1
|
1
|
6g
|
21.974
|
21.794
|
21.324
|
21.206
|
20.891
|
20.590
|
M22x1
|
1
|
4g6g
|
21.974
|
21.794
|
21.324
|
21.249
|
20.891
|
20.633
|
M22x0.75
|
0.75
|
6g
|
21.978
|
21.838
|
21.491
|
21.385
|
21.166
|
20.923
|
M22x0.75
|
0.75
|
4g6g
|
21.978
|
21.838
|
21.491
|
21.424
|
21.166
|
20.962
|
M22x0.5
|
0.5
|
6g
|
21.980
|
21.874
|
21.655
|
21.565
|
21.439
|
21.257
|
M22x0.5
|
0.5
|
4g6g
|
21.980
|
21.874
|
21.655
|
21.598
|
21.439
|
21.290
|
M24x3
|
3
|
6g
|
23.952
|
23.577
|
22.003
|
21.803
|
20.704
|
19.955
|
M24x3
|
3
|
4g6g
|
23.952
|
23.557
|
22.003
|
21.878
|
20.704
|
20.030
|
M24x2.5
|
2.5
|
6g
|
23.958
|
23.623
|
22.334
|
22.144
|
21.252
|
20.604
|
M24x2.5
|
2.5
|
4g6g
|
23.958
|
23.623
|
22.334
|
22.214
|
21.252
|
20.674
|
M24x2
|
2
|
6g
|
23.962
|
23.682
|
22.663
|
22.493
|
21.797
|
21.261
|
M24x2
|
2
|
4g6g
|
23.962
|
23.682
|
22.663
|
22.557
|
21.797
|
21.325
|
M24x1.5
|
1.5
|
6g
|
23.968
|
23.732
|
22.994
|
22.844
|
22.344
|
21.920
|
M24x1.5
|
1.5
|
4g6g
|
23.968
|
23.732
|
22.994
|
22.899
|
22.344
|
21.975
|
M24x1
|
1
|
6g
|
23.974
|
23.794
|
23.324
|
23.199
|
22.891
|
22.583
|
M24x1
|
1
|
4g6g
|
23.974
|
23.794
|
23.324
|
23.244
|
22.891
|
22.628
|
M24x0.75
|
0.75
|
6g
|
23.978
|
23.838
|
23.491
|
23.379
|
23.166
|
22.917
|
M24x0.75
|
0.75
|
4g6g
|
23.978
|
23.838
|
23.491
|
23.420
|
23.166
|
22.958
|
M25x2
|
2
|
6g
|
24.962
|
24.682
|
23.663
|
23.493
|
22.797
|
22.261
|
M25x2
|
2
|
4g6g
|
24.962
|
24.682
|
23.663
|
23.557
|
22.797
|
22.325
|
M25x1.5
|
1.5
|
6g
|
24.968
|
24.732
|
23.994
|
23.844
|
23.344
|
22.920
|
M25x1.5
|
1.5
|
4g6g
|
24.968
|
24.732
|
23.994
|
23.899
|
23.344
|
22.975
|
M25x1
|
1
|
6g
|
24.974
|
24.794
|
24.324
|
24.199
|
23.891
|
23.583
|
M25x1
|
1
|
4g6g
|
24.974
|
24.794
|
24.324
|
24.244
|
23.891
|
23.628
|
M26x1.5
|
1.5
|
6g
|
25.968
|
25.732
|
24.994
|
24.844
|
24.344
|
23.920
|
M26x1.5
|
1.5
|
4g6g
|
25.968
|
25.732
|
24.994
|
24.899
|
24.344
|
23.975
|
M27x3
|
3
|
6g
|
26.952
|
26.577
|
25.003
|
24.803
|
23.704
|
22.955
|
M27x3
|
3
|
4g6g
|
26.952
|
26.577
|
25.003
|
24.878
|
23.704
|
23.030
|
M27x2
|
2
|
6g
|
26.962
|
26.682
|
25.663
|
25.493
|
24.797
|
24.261
|
M27x2
|
2
|
4g6g
|
29.962
|
26.682
|
25.663
|
25.557
|
24.797
|
24.325
|
M27x1.5
|
1.5
|
6g
|
26.968
|
26.732
|
25.994
|
25.844
|
25.344
|
24.920
|
M27x1.5
|
1.5
|
4g6g
|
26.968
|
26.732
|
25.994
|
25.899
|
25.344
|
24.975
|
M27x1
|
1
|
6g
|
26.974
|
26.794
|
26.324
|
26.199
|
25.891
|
25.583
|
M27x1
|
1
|
4g6g
|
26.974
|
26.794
|
26.324
|
26.244
|
25.891
|
25.628
|
M27x0.75
|
0.75
|
6g
|
26.978
|
26.838
|
26.491
|
26.379
|
26.166
|
25.917
|
M27x0.75
|
0.75
|
4g6g
|
26.978
|
26.838
|
26.491
|
26.420
|
26.166
|
25.958
|
M28x2
|
2
|
6g
|
27.962
|
27.682
|
26.663
|
26.493
|
25.797
|
25.261
|
M28x2
|
2
|
4g6g
|
27.962
|
27.682
|
26.663
|
26.557
|
25.797
|
25.325
|
M28x1.5
|
1.5
|
6g
|
27.968
|
27.732
|
26.994
|
26.844
|
26.344
|
25.920
|
M28x1.5
|
1.5
|
4g6g
|
27.968
|
27.732
|
26.994
|
26.899
|
26.344
|
25.975
|
M28x1
|
1
|
6g
|
27.974
|
27.794
|
27.324
|
27.199
|
26.891
|
26.583
|
M28x1
|
1
|
4g6g
|
27.974
|
27.794
|
27.324
|
27.244
|
26.891
|
26.628
|
M30x3.5
|
3.5
|
6g
|
29.947
|
29.522
|
27.674
|
27.462
|
26.158
|
25.306
|
M30x3.5
|
3.5
|
4g6g
|
29.947
|
29.522
|
27.674
|
27.542
|
26.158
|
25.386
|
M30x3
|
3
|
6g
|
29.952
|
29.577
|
28.003
|
27.803
|
26.704
|
25.955
|
M30x3
|
3
|
4g6g
|
29.952
|
29.577
|
28.003
|
27.878
|
26.704
|
26.030
|
M30x2.5
|
2.5
|
6g
|
29.958
|
29.623
|
28.334
|
28.144
|
27.252
|
26.604
|
M30x2.5
|
2.5
|
4g6g
|
29.958
|
29.623
|
28.334
|
28.214
|
27.252
|
26.674
|
M30x2
|
2
|
6g
|
29.962
|
29.682
|
28.663
|
28.493
|
27.797
|
27.261
|
M30x2
|
2
|
4g6g
|
29.962
|
29.682
|
28.663
|
28.557
|
27.797
|
27.325
|
M30x1.5
|
1.5
|
6g
|
29.968
|
29.732
|
28.994
|
28.844
|
28.344
|
27.920
|
M30x1.5
|
1.5
|
4g6g
|
29.968
|
29.732
|
28.994
|
28.899
|
28.344
|
27.975
|
M30x1
|
1
|
6g
|
29.974
|
29.794
|
29.324
|
29.199
|
28.891
|
28.583
|
M30x1
|
1
|
4g6g
|
29.974
|
29.794
|
29.324
|
29.244
|
28.891
|
28.628
|
M30x0.75
|
0.75
|
6g
|
29.978
|
29.838
|
29.491
|
29.379
|
29.166
|
28.917
|
M30x0.75
|
0.75
|
4g6g
|
29.978
|
29.838
|
29.491
|
29.420
|
29.166
|
28.958
|
M32x2
|
2
|
6g
|
31.962
|
31.682
|
30.663
|
30.493
|
29.797
|
29.261
|
M32x2
|
2
|
4g6g
|
31.962
|
31.682
|
30.663
|
30.557
|
29.797
|
29.325
|
M32x1.5
|
1.5
|
6g
|
31.968
|
31.732
|
30.994
|
30.844
|
30.344
|
29.920
|
M32x1.5
|
1.5
|
4g6g
|
31.968
|
31.732
|
30.994
|
30.899
|
30.344
|
29.975
|
M33x3.5
|
3.5
|
6g
|
32.968
|
32.543
|
30.695
|
30.483
|
29.179
|
28.327
|
M33x3.5
|
3.5
|
4g6g
|
32.968
|
32.543
|
30.695
|
30.563
|
29.179
|
28.407
|
M33x3
|
3
|
6g
|
32.952
|
32.577
|
31.003
|
30.803
|
29.704
|
28.955
|
M33x3
|
3
|
4g6g
|
32.952
|
32.577
|
31.003
|
30.878
|
29.704
|
29.030
|
M33x2
|
2
|
6g
|
32.962
|
32.682
|
31.663
|
31.493
|
30.797
|
30.261
|
M33x2
|
2
|
4g6g
|
32.962
|
32.682
|
31.663
|
31.557
|
30.797
|
30.325
|
M33x1.5
|
1.5
|
6g
|
32.968
|
32.732
|
31.994
|
31.844
|
31.344
|
30.920
|
M33x1.5
|
1.5
|
4g6g
|
32.968
|
32.732
|
31.994
|
31.899
|
31.344
|
30.975
|
M33x1
|
1
|
6g
|
32.974
|
32.794
|
32.324
|
32.199
|
31.891
|
31.583
|
M33x1
|
1
|
4g6g
|
32.974
|
32.794
|
32.324
|
32.244
|
31.891
|
31.628
|
M33x0.75
|
0.75
|
6g
|
32.978
|
32.838
|
32.491
|
32.379
|
32.166
|
31.917
|
M33x0.75
|
0.75
|
4g6g
|
32.978
|
32.838
|
32.491
|
32.420
|
32.166
|
31.958
|
M35x1.5
|
1.5
|
6g
|
34.968
|
34.732
|
33.994
|
33.844
|
33.344
|
33.920
|
M35x1.5
|
1.5
|
4g6g
|
34.968
|
34.732
|
33.994
|
33.899
|
33.344
|
32.975
|
M36x4
|
4
|
6g
|
35.940
|
35.465
|
33.342
|
33.118
|
31.610
|
30.654
|
M36x4
|
4
|
4g6g
|
35.940
|
35.465
|
33.342
|
33.202
|
31.610
|
30.738
|
M36x3
|
3
|
6g
|
35.952
|
35.577
|
34.003
|
33.803
|
32.704
|
31.955
|
M36x3
|
3
|
4g6g
|
35.952
|
35.577
|
34.003
|
33.878
|
32.704
|
32.030
|
M36x2
|
2
|
6g
|
35.962
|
35.682
|
34.663
|
34.493
|
33.797
|
33.261
|
M36x2
|
2
|
4g6g
|
35.962
|
35.682
|
34.663
|
34.557
|
33.797
|
33.325
|
M36x1.5
|
1.5
|
6g
|
35.968
|
35.732
|
34.994
|
34.844
|
34.344
|
33.920
|
M36x1.5
|
1.5
|
4g6g
|
35.968
|
35.732
|
34.994
|
34.899
|
34.344
|
33.975
|
M36x1
|
1
|
6g
|
35.974
|
35.794
|
35.324
|
35.199
|
34.891
|
34.583
|
M36x1
|
1
|
4g6g
|
35.974
|
35.794
|
35.324
|
35.244
|
34.891
|
34.628
|
M38x1.5
|
1.5
|
6g
|
37.968
|
37.732
|
36.994
|
36.844
|
36.344
|
35.920
|
M38x1.5
|
1.5
|
4g6g
|
37.968
|
37.732
|
36.994
|
36.899
|
36.344
|
35.975
|
M39x4
|
4
|
6g
|
38.940
|
38.465
|
36.342
|
36.118
|
34.610
|
33.654
|
M39x4
|
4
|
4g6g
|
38.940
|
38.465
|
36.342
|
36.202
|
34.610
|
33.738
|
M39x3
|
3
|
6g
|
38.952
|
38.577
|
37.003
|
36.803
|
35.704
|
34.955
|
M39x3
|
3
|
4g6g
|
38.952
|
38.577
|
37.003
|
36.878
|
35.704
|
35.030
|
M39x2
|
2
|
6g
|
38.962
|
38.682
|
37.663
|
37.493
|
36.797
|
36.261
|
M39x2
|
2
|
4g6g
|
38.962
|
38.682
|
37.663
|
37.557
|
36.797
|
36.325
|
M39x1.5
|
1.5
|
6g
|
38.968
|
38.732
|
37.994
|
37.844
|
37.344
|
36.920
|
M39x1.5
|
1.5
|
4g6g
|
38.968
|
38.732
|
37.994
|
37.899
|
37.344
|
36.975
|
M39x1
|
1
|
6g
|
38.974
|
38.794
|
38.324
|
38.199
|
37.891
|
37.583
|
M39x1
|
1
|
4g6g
|
38.974
|
38.794
|
38.324
|
38.244
|
37.891
|
37.628
|
M40x3
|
3
|
6g
|
39.952
|
39.577
|
38.003
|
37.803
|
36.704
|
35.955
|
M40x3
|
3
|
4g6g
|
39.952
|
39.577
|
38.003
|
37.878
|
36.704
|
36.030
|
M40x2.5
|
2.5
|
6g
|
39.958
|
39.623
|
38.334
|
38.144
|
37.252
|
36.604
|
M40x2.5
|
2.5
|
4g6g
|
39.958
|
39.623
|
38.334
|
38.215
|
37.252
|
36.674
|
M40x2
|
2
|
6g
|
39.962
|
39.682
|
38.663
|
38.493
|
37.797
|
37.261
|
M40x2
|
2
|
4g6g
|
39.962
|
39.682
|
38.663
|
38.557
|
37.797
|
37.325
|
M40x1.5
|
1.5
|
6g
|
39.968
|
39.732
|
38.994
|
38.844
|
38.344
|
37.920
|
M40x1.5
|
1.5
|
4g6g
|
39.968
|
39.732
|
38.994
|
38.899
|
38.344
|
37.975
|
M42x4.5
|
4.5
|
6g
|
41.937
|
41.437
|
39.014
|
38.778
|
37.066
|
36.006
|
M42x4.5
|
4.5
|
4g6g
|
41.937
|
41.437
|
39.014
|
38.864
|
37.066
|
36.092
|
M42x4
|
4
|
6g
|
41.940
|
41.465
|
39.342
|
39.118
|
37.610
|
36.654
|
M42x4
|
4
|
4g6g
|
41.940
|
41.465
|
39.342
|
39.202
|
37.610
|
36.738
|
M42x3
|
3
|
6g
|
41.952
|
41.577
|
40.003
|
39.803
|
38.704
|
37.955
|
M42x3
|
3
|
4g6g
|
41.952
|
41.577
|
40.003
|
39.878
|
38.704
|
38.030
|
M42x2
|
2
|
6g
|
41.962
|
41.682
|
40.663
|
40.493
|
39.797
|
39.261
|
M42x2
|
2
|
4g6g
|
41.962
|
41.682
|
40.663
|
40.557
|
39.797
|
39.325
|
M42x1.5
|
1.5
|
6g
|
41.968
|
41.732
|
40.994
|
40.844
|
40.344
|
39.920
|
M42x1.5
|
1.5
|
4g6g
|
41.968
|
41.732
|
40.994
|
40.899
|
40.344
|
39.975
|
M42x1
|
1
|
6g
|
41.974
|
41.794
|
41.324
|
41.199
|
40.891
|
40.583
|
M42x1
|
1
|
4g6g
|
41.974
|
41.794
|
41.324
|
41.244
|
40.891
|
40.628
|
M45x4.5
|
4.5
|
6g
|
44.937
|
44.437
|
42.014
|
41.778
|
40.066
|
39.006
|
M45x4.5
|
4.5
|
4g6g
|
44.937
|
44.437
|
42.014
|
41.864
|
40.066
|
39.092
|
M45x4
|
4
|
6g
|
44.940
|
44.465
|
42.342
|
42.118
|
40.610
|
39.654
|
M45x4
|
4
|
4g6g
|
44.940
|
44.465
|
42.342
|
42.202
|
40.610
|
39.738
|
M45x3
|
3
|
6g
|
44.952
|
44.577
|
43.003
|
42.803
|
41.704
|
40.955
|
M45x3
|
3
|
4g6g
|
44.952
|
44.577
|
43.003
|
42.878
|
41.704
|
41.030
|
M45x2
|
2
|
6g
|
44.962
|
44.682
|
43.663
|
43.493
|
42.797
|
42.261
|
M45x2
|
2
|
4g6g
|
44.962
|
44.682
|
43.663
|
43.557
|
42.797
|
42.325
|
M45x1.5
|
1.5
|
6g
|
44.968
|
44.732
|
43.994
|
43.844
|
43.344
|
42.920
|
M45x1.5
|
1.5
|
4g6g
|
44.968
|
44.732
|
43.994
|
43.899
|
43.344
|
42.975
|
M45x1
|
1
|
6g
|
44.974
|
44.794
|
44.324
|
44.199
|
43.891
|
43.583
|
M45x1
|
1
|
4g6g
|
44.974
|
44.794
|
44.324
|
44.244
|
43.891
|
43.628
|
M48x5
|
5
|
6g
|
47.929
|
47.399
|
44.681
|
44.431
|
42.516
|
41.351
|
M48x5
|
5
|
4g6g
|
47.929
|
47.399
|
44.681
|
44.521
|
42.516
|
41.441
|
M48x4
|
4
|
6g
|
47.940
|
47.465
|
45.342
|
45.106
|
43.610
|
42.642
|
M48x4
|
4
|
4g6g
|
47.940
|
47.465
|
45.342
|
45.192
|
43.610
|
42.728
|
M48x3
|
3
|
6g
|
47.952
|
47.577
|
46.003
|
45.791
|
44.704
|
43.943
|
M48x3
|
3
|
4g6g
|
47.952
|
47.577
|
46.003
|
45.871
|
44.704
|
44.023
|
M48x2
|
2
|
6g
|
47.962
|
47.682
|
46.663
|
46.483
|
45.797
|
45.251
|
M48x2
|
2
|
4g6g
|
47.962
|
47.682
|
46.663
|
46.551
|
45.797
|
45.319
|
M48x1.5
|
1.5
|
6g
|
47.968
|
47.732
|
46.994
|
46.834
|
46.344
|
45.910
|
M48x1.5
|
1.5
|
4g6g
|
47.968
|
47.732
|
46.994
|
46.894
|
46.344
|
45.970
|
M50x4
|
4
|
6g
|
49.940
|
49.465
|
47.342
|
47.106
|
45.610
|
44.642
|
M50x4
|
4
|
4g6g
|
49.940
|
49.465
|
47.342
|
47.192
|
45.610
|
44.728
|
M50x3
|
3
|
6g
|
49.952
|
49.577
|
48.003
|
47.791
|
46.704
|
45.943
|
M50x3
|
3
|
4g6g
|
49.952
|
49.577
|
48.003
|
47.871
|
46.704
|
46.023
|
M50x2
|
2
|
6g
|
49.962
|
49.682
|
48.663
|
48.483
|
47.797
|
47.251
|
M50x2
|
2
|
4g6g
|
49.962
|
49.682
|
48.663
|
48.551
|
47.797
|
47.319
|
M50x1.5
|
1.5
|
6g
|
49.968
|
49.732
|
48.994
|
48.834
|
48.344
|
47.910
|
M50x1.5
|
1.5
|
4g6g
|
49.968
|
49.732
|
48.994
|
48.894
|
48.344
|
47.970
|
M52x5
|
5
|
6g
|
51.929
|
51.399
|
48.681
|
48.445
|
46.516
|
45.365
|
M52x5
|
5
|
4g6g
|
51.929
|
51.399
|
48.681
|
48.531
|
46.516
|
45.451
|
M52x4
|
4
|
6g
|
51.940
|
51.465
|
49.342
|
49.106
|
47.610
|
46.642
|
M52x4
|
4
|
4g6g
|
51.940
|
51.465
|
49.342
|
49.192
|
47.610
|
46.728
|
M52x3
|
3
|
6g
|
51.952
|
51.577
|
50.003
|
49.791
|
48.704
|
47.943
|
M52x3
|
3
|
4g6g
|
51.952
|
51.577
|
50.003
|
49.871
|
48.704
|
48.023
|
M52x2
|
2
|
6g
|
51.962
|
51.682
|
50.663
|
50.483
|
49.797
|
49.251
|
M52x2
|
2
|
4g6g
|
51.962
|
51.682
|
50.663
|
50.551
|
49.797
|
49.319
|
M52x1.5
|
1.5
|
6g
|
51.968
|
51.732
|
50.994
|
50.834
|
50.344
|
49.910
|
M52x1.5
|
1.5
|
4g6g
|
51.968
|
51.732
|
50.994
|
50.894
|
50.344
|
49.970
|
M55x4
|
4
|
6g
|
54.940
|
54.465
|
52.342
|
52.106
|
50.610
|
49.642
|
M55x4
|
4
|
4g6g
|
54.940
|
54.465
|
52.342
|
52.192
|
50.610
|
49.728
|
M55x3
|
3
|
6g
|
54.952
|
54.577
|
53.003
|
52.791
|
51.704
|
50.943
|
M55x3
|
3
|
4g6g
|
54.952
|
54.577
|
53.003
|
52.871
|
51.704
|
51.023
|
M55x2
|
2
|
6g
|
54.962
|
54.682
|
53.663
|
53.483
|
52.797
|
52.251
|
M55x2
|
2
|
4g6g
|
54.962
|
54.682
|
53.663
|
53.551
|
52.797
|
52.319
|
M55x1.5
|
1.5
|
6g
|
54.968
|
54.732
|
53.994
|
53.834
|
53.344
|
52.910
|
M55x1.5
|
1.5
|
4g6g
|
54.968
|
54.732
|
53.994
|
53.894
|
53.344
|
52.970
|
Related:
|