Nominal Size |
TPI |
Width Across Flats |
Width Across Corners |
Thickness Hex Nut |
Major diameter |
Pitch diameter |
Minor diameter |
Ran out of Bearing Face FIM |
||||||||
F |
G |
H |
(d) |
(d) |
(d) |
Specified Proof Load |
||||||||||
Up to 150,000 psi |
150,000 psi and Greater |
|||||||||||||||
Min. |
Max. |
Min. |
Max. |
Min. |
Max. |
Min. |
Min. |
Max. |
Min. |
Max. |
Max. |
|||||
1/4 |
0.2500 |
20 UNC |
Inch |
0.488 |
0.500 |
0.556 |
0.577 |
0.218 |
0.250 |
0.250 |
0.218 |
0.222 |
0.196 |
0.207 |
0.017 |
0.011 |
mm |
12.40 |
12.70 |
14.12 |
14.66 |
5.54 |
6.35 |
6.35 |
5.52 |
5.65 |
4.98 |
5.26 |
|||||
5/16 |
0.3125 |
18 UNC |
Inch |
0.546 |
0.562 |
0.622 |
0.650 |
0.280 |
0.314 |
0.313 |
0.276 |
0.282 |
0.252 |
0.265 |
0.020 |
0.012 |
mm |
13.87 |
14.27 |
15.80 |
16.51 |
7.11 |
7.98 |
7.94 |
7.02 |
7.16 |
6.40 |
6.73 |
|||||
3/8 |
0.3750 |
16 UNC |
Inch |
0.669 |
0.688 |
0.763 |
0.794 |
0.341 |
0.377 |
0.375 |
0.334 |
0.340 |
0.307 |
0.321 |
0.021 |
0.014 |
mm |
16.99 |
17.48 |
19.38 |
20.17 |
8.66 |
9.58 |
9.53 |
8.49 |
8.64 |
7.80 |
8.15 |
|||||
7/16 |
0.4375 |
14 UNC |
Inch |
0.728 |
0.750 |
0.830 |
0.866 |
0.403 |
0.441 |
0.438 |
0.391 |
0.397 |
0.360 |
0.376 |
0.022 |
0.015 |
mm |
18.49 |
19.05 |
21.08 |
22.00 |
10.24 |
11.20 |
11.11 |
9.93 |
10.09 |
9.14 |
9.55 |
|||||
1/2 |
0.5000 |
13 UNC |
Inch |
0.850 |
0.875 |
0.969 |
1.010 |
0.464 |
0.504 |
0.500 |
0.450 |
0.457 |
0.417 |
0.434 |
0.023 |
0.016 |
mm |
21.59 |
22.23 |
24.61 |
25.65 |
11.79 |
12.80 |
12.70 |
11.43 |
11.60 |
10.59 |
11.02 |
|||||
9/16 |
0.5625 |
12 UNC |
Inch |
0.909 |
0.938 |
1.037 |
1.083 |
0.526 |
0.568 |
0.563 |
0.508 |
0.515 |
0.472 |
0.490 |
0.024 |
0.017 |
mm |
23.09 |
23.83 |
26.34 |
27.51 |
13.36 |
14.43 |
14.29 |
12.91 |
13.09 |
11.99 |
12.45 |
|||||
5/8 |
0.6250 |
11 UNC |
Inch |
1.031 |
1.062 |
1.175 |
1.227 |
0.587 |
0.631 |
0.625 |
0.566 |
0.573 |
0.527 |
0.546 |
0.025 |
0.018 |
mm |
26.19 |
26.97 |
29.85 |
31.17 |
14.91 |
16.03 |
15.88 |
14.38 |
14.56 |
13.39 |
13.87 |
|||||
3/4 |
0.7500 |
10 UNC |
Inch |
1.212 |
1.250 |
1.382 |
1.443 |
0.710 |
0.758 |
0.750 |
0.685 |
0.693 |
0.642 |
0.663 |
0.027 |
0.020 |
mm |
30.78 |
31.75 |
35.10 |
36.65 |
18.03 |
19.25 |
19.05 |
17.40 |
17.59 |
16.31 |
16.84 |
|||||
7/8 |
0.8750 |
9 UNC |
Inch |
1.394 |
1.438 |
1.589 |
1.660 |
0.833 |
0.885 |
0.875 |
0.803 |
0.811 |
0.755 |
0.778 |
0.029 |
0.022 |
mm |
35.41 |
36.53 |
40.36 |
42.16 |
21.16 |
22.48 |
22.23 |
20.39 |
20.60 |
19.18 |
19.76 |
|||||
1 |
1.0000 |
8UNC |
Inch |
1.575 |
1.625 |
1.796 |
1.876 |
0.956 |
1.012 |
1.000 |
0.919 |
0.928 |
0.865 |
0.890 |
0.031 |
0.024 |
mm |
40.01 |
41.28 |
45.62 |
47.65 |
24.28 |
25.70 |
25.40 |
23.34 |
23.56 |
21.97 |
22.61 |
|||||
1-1/8 |
1.1250 |
8UN |
Inch |
1.756 |
1.812 |
2.002 |
2.093 |
1.079 |
1.139 |
1.125 |
1.044 |
1.053 |
0.990 |
1.015 |
0.033 |
0.027 |
mm |
44.60 |
46.02 |
50.85 |
53.16 |
27.41 |
28.93 |
28.58 |
26.51 |
26.74 |
25.15 |
25.78 |
|||||
1-1/4 |
1.2500 |
8UN |
Inch |
1.938 |
2.000 |
2.209 |
2.309 |
1.187 |
1.251 |
1.250 |
1.169 |
1.178 |
1.115 |
1.140 |
0.035 |
0.030 |
mm |
49.23 |
50.80 |
56.11 |
58.65 |
30.15 |
31.78 |
31.75 |
29.69 |
29.92 |
28.32 |
28.96 |
|||||
1-3/8 |
1.3750 |
8UN |
Inch |
2.119 |
2.188 |
2.416 |
2.526 |
1.310 |
1.378 |
1.375 |
1.294 |
1.303 |
1.240 |
1.265 |
0.038 |
0.033 |
mm |
53.82 |
55.58 |
61.37 |
64.16 |
33.27 |
35.00 |
34.93 |
32.86 |
33.10 |
31.50 |
32.13 |
|||||
1-1/2 |
1.5000 |
8UN |
Inch |
2.300 |
2.375 |
2.622 |
2.742 |
1.433 |
1.505 |
1.500 |
1.419 |
1.428 |
1.365 |
1.390 |
0.041 |
0.036 |
mm |
58.42 |
60.33 |
66.60 |
69.65 |
36.40 |
38.23 |
38.10 |
36.04 |
36.28 |
34.67 |
35.31 |
|||||
1-5/8 |
1.6250 |
8UN |
Inch |
2.481 |
2.562 |
2.828 |
2.959 |
1.556 |
1.632 |
1.625 |
1.544 |
1.554 |
1.490 |
1.515 |
0.044 |
0.038 |
mm |
63.02 |
65.07 |
71.83 |
75.16 |
39.52 |
41.45 |
41.28 |
39.21 |
39.46 |
37.85 |
38.48 |
|||||
1-3/4 |
1.7500 |
8UN |
Inch |
2.662 |
2.750 |
3.035 |
3.175 |
1.679 |
1.759 |
1.750 |
1.669 |
1.679 |
1.615 |
1.640 |
0.048 |
0.041 |
mm |
67.61 |
69.85 |
77.09 |
80.65 |
42.65 |
44.68 |
44.45 |
42.39 |
42.64 |
41.02 |
41.66 |
|||||
1-7/8 |
1.8750 |
8UN |
Inch |
2.844 |
2.938 |
3.242 |
3.392 |
1.802 |
1.886 |
1.875 |
1.794 |
1.804 |
1.740 |
1.765 |
0.051 |
0.044 |
mm |
72.24 |
74.63 |
82.35 |
86.16 |
45.77 |
47.90 |
47.63 |
45.56 |
45.82 |
44.20 |
44.83 |
|||||
2 |
2.0000 |
8UN |
Inch |
3.025 |
3.125 |
3.449 |
3.608 |
1.925 |
2.013 |
2.000 |
1.919 |
1.929 |
1.865 |
1.890 |
0.055 |
0.047 |
mm |
76.84 |
79.38 |
87.60 |
91.64 |
48.90 |
51.13 |
50.80 |
48.74 |
48.99 |
47.37 |
48.01 |
|||||
2-1/4 |
2.2500 |
8UN |
Inch |
3.388 |
3.500 |
3.862 |
4.041 |
2.155 |
2.251 |
2.250 |
2.169 |
2.179 |
2.115 |
2.140 |
0.061 |
0.052 |
mm |
86.06 |
88.90 |
98.09 |
102.64 |
54.74 |
57.18 |
57.15 |
55.09 |
55.35 |
53.72 |
54.36 |
|||||
2-1/2 |
2.5000 |
8UN |
Inch |
3.750 |
3.875 |
4.275 |
4.474 |
2.401 |
2.505 |
2.500 |
2.419 |
2.429 |
2.365 |
2.390 |
0.068 |
0.058 |
mm |
95.25 |
98.43 |
108.59 |
113.64 |
60.99 |
63.63 |
63.50 |
61.44 |
61.71 |
60.07 |
60.71 |
|||||
2-3/4 |
2.7500 |
8UN |
Inch |
4.112 |
4.250 |
4.688 |
4.907 |
2.647 |
2.759 |
2.750 |
2.669 |
2.680 |
2.615 |
2.640 |
0.071 |
0.064 |
mm |
104.44 |
107.95 |
119.08 |
124.64 |
67.23 |
70.08 |
69.85 |
67.79 |
68.06 |
66.42 |
67.06 |
|||||
3 |
3.0000 |
8UN |
Inch |
4.475 |
4.625 |
5.102 |
5.340 |
2.893 |
3.013 |
3.000 |
2.919 |
2.930 |
2.865 |
2.890 |
0.081 |
0.070 |
mm |
113.67 |
117.48 |
129.59 |
135.64 |
73.48 |
76.53 |
76.20 |
74.14 |
74.42 |
72.77 |
73.41 |