bolt table :p
| Nominal |
Major Diameter |
Minor Diameter |
Standard Pitch |
Pitch Diameter |
Tapping Drill Diameter |
Clearance Diameter |
Hex Head Across Flats |
Hex Head Widest |
Hex Head Height |
Socket Head Diameter |
Allen Key Size |
| M1.6 |
1.6 |
1.221 |
0.35 |
1.373 |
1.25 |
2 |
3.2 |
3.70 |
1.1 |
3 |
1.5 |
| M2 |
2 |
1.567 |
0.4 |
1.74 |
1.6 |
2.6 |
4 |
4.62 |
1.4 |
3.8 |
1.5 |
| M2.5 |
2.5 |
2.013 |
0.45 |
2.208 |
2.05 |
3.1 |
5 |
5.77 |
1.7 |
4.5 |
2 |
| M3 |
3 |
2.459 |
0.5 |
2.675 |
2.5 |
3.6 |
5.5 |
6.35 |
2 |
5.5 |
2.5 |
| M4 |
4 |
3.242 |
0.7 |
3.545 |
3.3 |
4.8 |
7 |
8.08 |
2.8 |
7 |
3 |
| M5 |
5 |
4.134 |
0.8 |
4.48 |
4.2 |
5.8 |
8 |
9.24 |
3.5 |
8.5 |
4 |
| M6 |
6 |
4.917 |
1 |
5.35 |
5 |
7 |
10 |
11.55 |
4 |
10 |
5 |
| M8 |
8 |
6.647 |
1.25 |
7.188 |
6.8 |
10 |
13 |
15.01 |
5.3 |
13 |
6 |
| M10 |
10 |
8.376 |
1.5 |
9.026 |
8.5 |
12 |
16 |
18.48 |
6.4 |
16 |
8 |
| M12 |
12 |
10.106 |
1.75 |
10.863 |
10.2 |
15 |
18 |
20.78 |
7.5 |
18 |
10 |
| M14 |
14 |
11.835 |
2 |
12.701 |
12 |
17 |
21 |
24.25 |
8.8 |
21 |
12 |
| M16 |
16 |
13.835 |
2 |
14.701 |
14 |
19 |
24 |
27.71 |
10 |
24 |
14 |
| M18 |
18 |
15.394 |
2.5 |
16.376 |
15.5 |
22 |
27 |
31.18 |
11.5 |
27 |
14 |
| M20 |
20 |
17.294 |
2.5 |
18.376 |
17.5 |
24 |
30 |
34.64 |
12.5 |
30 |
17 |
| M22 |
22 |
19.294 |
2.5 |
20.376 |
19.5 |
26 |
32 |
36.95 |
14 |
33 |
17 |
| M24 |
24 |
20.752 |
3 |
22.051 |
21 |
28 |
36 |
41.57 |
15 |
36 |
19 |
| M27 |
27 |
23.752 |
3 |
25.051 |
24 |
33 |
41 |
47.34 |
17 |
40 |
19 |
| M30 |
30 |
26.211 |
3.5 |
27.727 |
26.5 |
35 |
46 |
53.12 |
18.7 |
45 |
22 |
| M36 |
36 |
31.67 |
4 |
33.402 |
32 |
41 |
55 |
63.51 |
22.5 |
54 |
27 |
| M42 |
42 |
37.129 |
4.5 |
39.077 |
37.5 |
47 |
65 |
75.06 |
26 |
63 |
32 |
| M48 |
48 |
42.857 |
5 |
44.752 |
43 |
53 |
75 |
86.60 |
30 |
72 |
36 |
| M56 |
56 |
50.046 |
5.5 |
52.428 |
50.5 |
61 |
85 |
98.15 |
35 |
84 |
41 |
| M64 |
64 |
57.505 |
6 |
60.103 |
58 |
69 |
95 |
109.70 |
40 |
96 |
46 |