Nominal Size |
Width / Across Flat (s) |
Thickness / Height (m) |
Width Across Corners (e) |
||
|
|
MIn |
Max |
Min |
Max |
Min |
M5 |
7.78 |
8.00 |
4.40 |
4.70 |
8.79 |
M6 |
9.78 |
10.00 |
4.90 |
5.20 |
11.05 |
M8 |
12.73 |
13.00 |
6.44 |
6.80 |
14.38 |
M10 |
15.73 |
16.00 |
8.04 |
8.40 |
17.77 |
M12 |
17.73 |
18.00 |
10.37 |
10.80 |
20.03 |
M14 |
20.67 |
21.00 |
12.10 |
12.80 |
23.36 |
M16 |
23.67 |
24.00 |
14.10 |
14.80 |
26.75 |
M18 |
26.16 |
27.00 |
15.10 |
15.80 |
29.56 |
M20 |
29.16 |
30.00 |
16.90 |
18.00 |
32.95 |
M22 |
33.00 |
34.00 |
18.10 |
19.40 |
37.29 |
M24 |
35.00 |
36.00 |
20.20 |
21.50 |
39.55 |
M27 |
40.00 |
41.00 |
22.50 |
23.80 |
45.20 |
M30 |
45.00 |
46.00 |
24.30 |
25.60 |
50.85 |
Nominal Size |
Width / Across Flat (s) |
Thickness / Height (m) |
Width Across Corners (e) |
||
|
|
Min |
Max |
Min |
Max |
MIn |
1/4" |
0.428 |
0.438 |
0.212 |
0.226 |
0.488 |
5/16" |
0.489 |
0.500 |
0.258 |
0.273 |
0.557 |
3/8" |
0.551 |
0.562 |
0.320 |
0.337 |
0.628 |
7/16" |
0.675 |
0.688 |
0.365 |
0.385 |
0.768 |
1/2" |
0.736 |
0.750 |
0.427 |
0.448 |
0.840 |
9/16" |
0.861 |
0.875 |
0.473 |
0.496 |
0.982 |
5/8" |
0.922 |
0.938 |
0.535 |
0.559 |
1.051 |
3/4" |
1.088 |
1.125 |
0.617 |
0.665 |
1.240 |
7/8" |
1.269 |
1.312 |
0.724 |
0.776 |
1.447 |
1" |
1.45 |
1.500 |
0.831 |
0.887 |
1.653 |
