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ASTM A193
Metric Heavy Hex Screws-NINGBO BOLT |
Dimensions of Metric Heavy Hex Screws
|
Nominal Screw Diameter, D, and Thread Pitch |
Body
Diameter Ds, |
Width
Across Flats, S |
Width
Across Corners, E |
Head
Height, K |
Wrenching Height, K1 |
Washer
Face Thickness, C |
Washer
Face Diameter, Dw |
|
Max |
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Min |
Max |
Min |
Max |
|
M12 x 1.75 |
12.00 |
11.73 |
21.00 |
20.67 |
24.25 |
23.35 |
7.76 |
7.24 |
5.2 |
0.6 |
0.3 |
19.6 |
|
M14 x 2 |
14.00 |
13.73 |
24.00 |
23.67 |
27.71 |
26.75 |
9.09 |
8.51 |
6.2 |
0.6 |
0.3 |
22.5 |
|
M16 x 2 |
16.00 |
15.73 |
27.00 |
26.67 |
31.18 |
30.14 |
10.32 |
9.68 |
7.0 |
0.8 |
0.4 |
25.3 |
|
M20 x 2.5 |
20.00 |
19.67 |
34.00 |
33.00 |
39.26 |
37.29 |
12.88 |
12.12 |
8.8 |
0.8 |
0.4 |
31.4 |
|
M24 x 3 |
24.00 |
23.67 |
41.00 |
40.00 |
47.34 |
45.20 |
15.44 |
14.56 |
10.5 |
0.8 |
0.4 |
38.0 |
|
M30 x 3.5 |
30.00 |
29.67 |
50.00 |
49.00 |
57.74 |
55.37 |
19.48 |
17.92 |
13.1 |
0.8 |
0.4 |
46.6 |
|
M36 x 4 |
36.00 |
35.61 |
60.00 |
58.80 |
69.28 |
66.44 |
23.38 |
21.72 |
15.8 |
0.8 |
0.4 |
55.9 |
1.
All dimensions are in millimeters.
2.
Basic
thread lengths, B, are the same as given in table 12.
3.
Transition Thread length X, includes the length of
incomplete threads and tolerances on grip gaging length and body length. It is
intended for calculation puposes
4.
For additional manufacturing and acceptance specifications,
reference should be made to the standard.
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